# Heap Errors on ES 5.2.0

**URL:** <https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213>\
**Category:** Elasticsearch\
**Created:** [May 26, 2017, 8:03am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213 "2017-05-26T08:03:34Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 8:03am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/1 "2017-05-26T08:03:34Z")

</div>

Hello,

I am facing java.lang.OutOfMemoryError: Java heap space, errors resulting in cluster crash on ES 5.2.0, below is the log generated from one of the nodes in the cluster.

This is a 5 node cluster with minimum 2 masters,

All we are attempting to do is index 3 million docs (including text files) using the ingest attachment processor, which is resulting the above error.

Are there any known issues for this version

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 8:04am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/2 "2017-05-26T08:04:42Z")

</div>

> [2017-05-26T07:04:25,470][INFO][o.e.n.Node] initializing ...  
> [2017-05-26T07:04:25,548][INFO][o.e.e.NodeEnvironment] [GJGT9UH] using [1] data paths, mounts [[/ (rootfs)]], net usable\_space [302.9gb], net total\_space [567.4gb], spins? [unknown], types [rootfs]  
> [2017-05-26T07:04:25,548][INFO][o.e.e.NodeEnvironment] [GJGT9UH] heap size [39.9gb], compressed ordinary object pointers [false]  
> [2017-05-26T07:04:25,617][INFO][o.e.n.Node] node name [GJGT9UH] derived from node ID [GJGT9UH-SFSdeZJjkPlnMQ]; set [node.name] to override  
> [2017-05-26T07:04:25,619][INFO][o.e.n.Node] version[5.2.0], pid[21768], build[24e05b9/2017-01-24T19:52:35.800Z], OS[Linux/3.10.0-514.el7.x86\_64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0\_121/25.121-b13]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [aggs-matrix-stats]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [ingest-common]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [lang-expression]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [lang-groovy]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [lang-mustache]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [lang-painless]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [percolator]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [reindex]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [transport-netty3]  
> [2017-05-26T07:04:26,417][INFO][o.e.p.PluginsService] [GJGT9UH] loaded module [transport-netty4]  
> [2017-05-26T07:04:26,418][INFO][o.e.p.PluginsService] [GJGT9UH] loaded plugin [ingest-attachment]  
> [2017-05-26T07:04:29,801][INFO][o.e.n.Node] initialized  
> [2017-05-26T07:04:29,801][INFO][o.e.n.Node] [GJGT9UH] starting ...  
> [2017-05-26T07:04:29,916][INFO][o.e.t.TransportService] [GJGT9UH] publish\_address {:9300}, bound\_addresses {:9300}  
> [2017-05-26T07:04:29,920][INFO][o.e.b.BootstrapChecks] [GJGT9UH] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks  
> [2017-05-26T07:04:35,156][INFO][o.e.c.s.ClusterService] [GJGT9UH] detected\_master {AEzqo8J}{AEzqo8J3RHiFcvwiKnwYSg}{PEce-l0rQFKocM8vqIDbWg}{}{:9300}, added {{786uRr9}{786uRr9CRNWTsnfC-2DS6Q}{dbtLQTXVSXu-Y1wxAXVgvw}{}{:9300},{AEzqo8J}{AEzqo8J3RHiFcvwiKnwYSg}{PEce-l0rQFKocM8vqIDbWg}{}{:9300},{uh1Haz-}{uh1Haz-5RUOVclHX-bBtQw}{upM2ifVDSaKZEd0UUr0lnA}{}{:9300},}, reason: zen-disco-receive(from master [master {AEzqo8J}{AEzqo8J3RHiFcvwiKnwYSg}{PEce-l0rQFKocM8vqIDbWg}{}{:9300} committed version [9]])

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 8:05am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/3 "2017-05-26T08:05:21Z")

</div>

> [2017-05-26T07:04:35,248][INFO][o.e.h.HttpServer] [GJGT9UH] publish\_address {:9200}, bound\_addresses {:9200}  
> [2017-05-26T07:04:35,248][INFO][o.e.n.Node] [GJGT9UH] started  
> [2017-05-26T07:04:44,530][INFO][o.e.c.s.ClusterService] [GJGT9UH] added {{mVQ5CKg}{mVQ5CKgpRD64SZ8o9W6FwQ}{FfJrK3WpSVSReW8W1pPwsQ}{10.224.59.211}{10.224.59.211:9300},}, reason: zen-disco-receive(from master [master {AEzqo8J}{AEzqo8J3RHiFcvwiKnwYSg}{PEce-l0rQFKocM8vqIDbWg}{}{:9300} committed version [16]])  
> [2017-05-26T07:04:44,866][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][15] overhead, spent [298ms] collecting in the last [1s]  
> [2017-05-26T07:04:45,867][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][16] overhead, spent [263ms] collecting in the last [1s]  
> [2017-05-26T07:04:59,019][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][29] overhead, spent [303ms] collecting in the last [1s]collecting in the last [1s]  
> [2017-05-26T07:05:22,348][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][52] overhead, spent [289ms]  
> [2017-05-26T07:15:42,389][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][669] overhead, spent [252ms] collecting in the last [1s]  
> [2017-05-26T07:45:06,428][DEBUG][o.e.a.a.c.n.i.TransportNodesInfoAction] [GJGT9UH] failed to execute on node [786uRr9CRNWTsnfC-2DS6Q]  
> org.elasticsearch.transport.ReceiveTimeoutTransportException: [786uRr9][:9300][cluster:monitor/nodes/info[n]] request\_id [250660] timed out after [2000ms]  
> at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:908) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:527) [elasticsearch-5.2.0.jar:5.2.0]  
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0\_121]  
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0\_121]  
> at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_121]  
> [2017-05-26T07:45:06,434][WARN][o.e.a.a.c.n.i.TransportNodesInfoAction] [GJGT9UH] not accumulating exceptions, excluding exception from response  
> org.elasticsearch.action.FailedNodeException: Failed node [786uRr9CRNWTsnfC-2DS6Q]  
> at org.elasticsearch.action.support.nodes.TransportNodesAction$AsyncAction.onFailure(TransportNodesAction.java:247) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.action.support.nodes.TransportNodesAction$AsyncAction.access$300(TransportNodesAction.java:160) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.action.support.nodes.TransportNodesAction$AsyncAction$1.handleException(TransportNodesAction.java:219) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.transport.TransportService$ContextRestoreResponseHandler.handleException(TransportService.java:1024) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:907) [elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:527) [elasticsearch-5.2.0.jar:5.2.0]  
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0\_121]  
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0\_121]  
> at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_121]  
> Caused by: org.elasticsearch.transport.ReceiveTimeoutTransportException: [786uRr9][:9300][cluster:monitor/nodes/info[n]] request\_id [250660] timed out after [2000ms]  
> at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:908) ~[elasticsearch-5.2.0.jar:5.2.0]  
> ... 4 more

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 8:06am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/4 "2017-05-26T08:06:18Z")

</div>

> [2017-05-26T07:45:07,615][WARN][o.e.t.TransportService] [GJGT9UH] Received response for a request that has timed out, sent [3189ms] ago, timed out [1189ms] ago, action [cluster:monitor/nodes/info[n]], node [{786uRr9}{786uRr9CRNWTsnfC-2DS6Q}{dbtLQTXVSXu-Y1wxAXVgvw}{}{:9300}], id [250660]  
> [2017-05-26T07:45:15,255][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][2435] overhead, spent [278ms] collecting in the last [1s]  
> [2017-05-26T07:45:16,255][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][2436] overhead, spent [420ms] collecting in the last [1s]  
> [2017-05-26T07:45:17,320][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][2437] overhead, spent [431ms] collecting in the last [1s]  
> [2017-05-26T07:45:21,320][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][2441] overhead, spent [275ms] collecting in the last [1s]  
> [2017-05-26T07:45:40,378][INFO][o.e.m.j.JvmGcMonitorService] [GJGT9UH] [gc][2460] overhead, spent [297ms] collecting in the last [1s]collecting in the last [1s]  
> [2017-05-26T07:54:11,830][ERROR][o.e.t.n.Netty4Utils] fatal error on the network layer  
> at org.elasticsearch.transport.netty4.Netty4Utils.maybeDie(Netty4Utils.java:140)  
> at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.exceptionCaught(Netty4HttpRequestHandler.java:77)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:286)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:265)  
> at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:257)  
> at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:131)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:286)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:265)  
> at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:257)  
> at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:131)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:286)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:265)  
> at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:257)  
> at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:131)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:286)  
> at io.netty.channel.AbstractChannelHandlerContext.notifyHandlerException(AbstractChannelHandlerContext.java:851)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)  
> at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)  
> at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)  
> at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:280)  
> at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:396)  
> at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)  
> at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341)  
> at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349)  
> at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 26, 2017, 8:40am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/5 "2017-05-26T08:40:37Z")

</div>

Are you really running a 40GB heap?

---

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [May 26, 2017, 8:43am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/6 "2017-05-26T08:43:07Z")

</div>

What is your average document size? Are you using bulk requests? If so, how large are they?

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 9:25am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/7 "2017-05-26T09:25:10Z")

</div>

> [@warkolm](#):
>
> Are you really running a 40GB heap?

Yes, we had initially set it to 30g, & faced this error, post which we increased the heap but are still facing this.

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 26, 2017, 9:25am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/8 "2017-05-26T09:25:54Z")

</div>

Increasing it isn't likely to help.

Do you have the Monitoring plugin installed? If not, how are you monitoring things?  
Also there's no OOM error in those logs, can you show one?

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 9:29am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/9 "2017-05-26T09:29:19Z")

</div>

> [@warkolm](#):
>
> Increasing it isn't likely to help.
> 
> Do you have the Monitoring plugin installed? If not, how are you monitoring things?  
> Also there's no OOM error in those logs, can you show one?

> [2017-05-26T08:41:09,809][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] fatal error in thread [elasticsearch[GJGT9UH][index][T#5]], exiting  
> java.lang.OutOfMemoryError: Java heap space  
> at java.util.Arrays.copyOfRange(Arrays.java:3664) ~[?:1.8.0\_121]  
> at java.lang.String.(String.java:207) ~[?:1.8.0\_121]  
> at java.lang.StringBuilder.toString(StringBuilder.java:407) ~[?:1.8.0\_121]  
> at com.fasterxml.jackson.core.util.TextBuffer.contentsAsString(TextBuffer.java:356) ~[jackson-core-2.8.6.jar:2.8.6]  
> at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.\_finishAndReturnString(UTF8StreamJsonParser.java:2470) ~[jackson-core-2.8.6.jar:2.8.6]  
> at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.getText(UTF8StreamJsonParser.java:315) ~[jackson-core-2.8.6.jar:2.8.6]  
> at org.elasticsearch.common.xcontent.json.JsonXContentParser.text(JsonXContentParser.java:86) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readValue(AbstractXContentParser.java:352) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readMap(AbstractXContentParser.java:300) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readMap(AbstractXContentParser.java:263) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.support.AbstractXContentParser.map(AbstractXContentParser.java:218) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.XContentHelper.convertToMap(XContentHelper.java:105) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.xcontent.XContentHelper.convertToMap(XContentHelper.java:78) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.action.index.IndexRequest.sourceAsMap(IndexRequest.java:410) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.ingest.PipelineExecutionService.innerExecute(PipelineExecutionService.java:164) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.ingest.PipelineExecutionService.access$000(PipelineExecutionService.java:41) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.ingest.PipelineExecutionService$1.doRun(PipelineExecutionService.java:65) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:596) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-5.2.0.jar:5.2.0]  
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[?:1.8.0\_121]  
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[?:1.8.0\_121]  
> at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_121]

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 9:30am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/10 "2017-05-26T09:30:10Z")

</div>

> [@warkolm](#):
>
> Increasing it isn't likely to help.
> 
> Do you have the Monitoring plugin installed? If not, how are you monitoring things?  
> Also there's no OOM error in those logs, can you show one?

I don't have any monitoring plugin installed ATM ,i've been monitoring the cluster using cerebro

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 26, 2017, 9:33am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/11 "2017-05-26T09:33:17Z")

</div>

Oh 5.2!

Upgrade to 5.2.2, there's known issues with heap leaks in 5.2.0.

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 9:41am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/12 "2017-05-26T09:41:34Z")

</div>

> [@warkolm](#):
>
> Oh 5.2!
> 
> Upgrade to 5.2.2, there's known issues with heap leaks in 5.2.0.

Oh, is it, didn't see any known issues / reported issues for 5.2.0 earlier, I will surely upgrade to 5.2.2 & observe the cluster.

In the mean time, could you let me know apart from the release notes for 5.2.2 are there any API / rest level changes as I am using NEST client to connect with the elastic cluster, so just an upgrade of the version would work for me or should i be expecting any code level changes from my application side.

Thanks for your prompt responses.

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 26, 2017, 9:43am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/13 "2017-05-26T09:43:15Z")

</div>

No there won't be, it's a bug fix only.

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 26, 2017, 10:48am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/14 "2017-05-26T10:48:53Z")

</div>

> [@warkolm](#):
>
> No there won't be, it's a bug fix only.

Is it safe to go for 5.2.2, i could see similar issue reported for 5.2.2 [ES 5.2.2: Sudden heap spikes followed by cluster crash](https://discuss.elastic.co/t/es-5-2-2-sudden-heap-spikes-followed-by-cluster-crash/80977)

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 26, 2017, 10:50am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/15 "2017-05-26T10:50:38Z")

</div>

Try going to 5.3.2 then 🙂

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 29, 2017, 7:11am UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/16 "2017-05-29T07:11:21Z")

</div>

> [@warkolm](#):
>
> Try going to 5.3.2 then 🙂

Hello @warkolm,

Upgraded to 5.3.2 & still facing the same issue.

Are there any specific settings I am missing out.

> [2017-05-29T07:45:19,528][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] fatal error in thread [Thread-22], exiting  
> java.lang.OutOfMemoryError: Java heap space  
> at io.netty.buffer.PoolArena$HeapArena.newUnpooledChunk(PoolArena.java:661) ~[?:?]  
> at io.netty.buffer.PoolArena.allocateHuge(PoolArena.java:246) ~[?:?]  
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:224) ~[?:?]  
> at io.netty.buffer.PoolArena.allocate(PoolArena.java:141) ~[?:?]  
> at io.netty.buffer.PooledByteBufAllocator.newHeapBuffer(PooledByteBufAllocator.java:272) ~[?:?]  
> at io.netty.buffer.AbstractByteBufAllocator.heapBuffer(AbstractByteBufAllocator.java:160) ~[?:?]  
> at io.netty.buffer.AbstractByteBufAllocator.heapBuffer(AbstractByteBufAllocator.java:151) ~[?:?]  
> at io.netty.buffer.CompositeByteBuf.allocBuffer(CompositeByteBuf.java:1653) ~[?:?]  
> at io.netty.buffer.CompositeByteBuf.consolidateIfNeeded(CompositeByteBuf.java:405) ~[?:?]  
> at io.netty.buffer.CompositeByteBuf.addComponent(CompositeByteBuf.java:196) ~[?:?]  
> at io.netty.handler.codec.MessageAggregator.appendPartialContent(MessageAggregator.java:317) ~[?:?]  
> at io.netty.handler.codec.MessageAggregator.decode(MessageAggregator.java:282) ~[?:?]  
> at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) ~[?:?]  
> at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) ~[?:?]  
> at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) ~[?:?]  
> at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:280) ~[?:?]  
> at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:396) ~[?:?]  
> at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) ~[?:?]  
> at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) ~[?:?]  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) ~[?:?]  
> at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) ~[?:?]

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 30, 2017, 7:57pm UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/17 "2017-05-30T19:57:29Z")

</div>

@warkolm

still receiving this

> `[2017-05-30T20:51:12,241][ERROR][o.e.t.n.Netty4Utils] fatal error on the network layer at org.elasticsearch.transport.netty4.Netty4Utils.maybeDie(Netty4Utils.java:140) at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.exceptionCaught(Netty4HttpRequestHandler.java:81) at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:286) at io.netty.channel.AbstractChannelHandlerContext.notifyHandlerException(AbstractChannelHandlerContext.java:851) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at org.elasticsearch.http.netty4.pipelining.HttpPipeliningHandler.channelRead(HttpPipeliningHandler.java:63) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:129) at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:642) at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:527) at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:481) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:441) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) at java.lang.Thread.run(Thread.java:745) `

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 30, 2017, 7:58pm UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/18 "2017-05-30T19:58:47Z")

</div>

```
[2017-05-30T20:51:12,245][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [] fatal error in thread [Thread-7], exiting
java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOfRange(Arrays.java:3664) ~[?:1.8.0_121]
    at java.lang.String.<init>(String.java:207) ~[?:1.8.0_121]
    at java.nio.HeapCharBuffer.toString(HeapCharBuffer.java:567) ~[?:1.8.0_121]
    at java.nio.CharBuffer.toString(CharBuffer.java:1241) ~[?:1.8.0_121]
    at io.netty.buffer.ByteBufUtil.decodeString(ByteBufUtil.java:628) ~[?:?]
    at io.netty.buffer.AbstractByteBuf.toString(AbstractByteBuf.java:1213) ~[?:?]
    at org.elasticsearch.transport.netty4.ByteBufBytesReference.utf8ToString(ByteBufBytesReference.java:74) ~[?:?]
    at org.elasticsearch.common.xcontent.XContentHelper.convertToJson(XContentHelper.java:165) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.XContentHelper.convertToJson(XContentHelper.java:154) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.XContentHelper.convertToJson(XContentHelper.java:149) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.action.index.IndexRequest.toString(IndexRequest.java:698) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.action.support.replication.ReplicationRequest.getDescription(ReplicationRequest.java:249) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.action.support.replication.ReplicationRequest.createTask(ReplicationRequest.java:225) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.tasks.TaskManager.register(TaskManager.java:87) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:80) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.client.node.NodeClient.executeLocally(NodeClient.java:83) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.client.node.NodeClient.doExecute(NodeClient.java:72) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:404) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.client.support.AbstractClient.index(AbstractClient.java:416) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.rest.action.document.RestIndexAction.lambda$prepareRequest$1(RestIndexAction.java:90) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.rest.action.document.RestIndexAction$$Lambda$1593/1212503415.accept(Unknown Source) ~[?:?]
    at org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:80) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:260) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:199) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.http.netty4.Netty4HttpServerTransport.dispatchRequest(Netty4HttpServerTransport.java:505) ~[?:?]
    at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:72) ~[?:?]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) ~[?:?]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:349) ~[?:?]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:341) ~[?:?]
    at org.elasticsearch.http.netty4.pipelining.HttpPipeliningHandler.channelRead(HttpPipeliningHandler.java:63) ~[?:?]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363) ~[?:?]
```

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 30, 2017, 7:59pm UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/19 "2017-05-30T19:59:36Z")

</div>

@warkolm

is this related ? [Disable the Netty recycler](https://github.com/elastic/elasticsearch/pull/22452)

---

<div class="post-metadata">

**Author:** ![Vikas\_Mestry](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vikas_mestry/32/42301_2.png) [@Vikas\_Mestry](https://discuss.elastic.co/u/Vikas_Mestry)\
**Post date:** [May 30, 2017, 8:42pm UTC](https://discuss.elastic.co/t/heap-errors-on-es-5-2-0/87213/20 "2017-05-30T20:42:02Z")

</div>

```
`[2017-05-30T21:40:18,773][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [] fatal error in thread [elasticsearch[AEzqo8J][bulk][T#6]], exiting
java.lang.OutOfMemoryError: Java heap space
    at java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:68) ~[?:1.8.0_121]
    at java.lang.StringBuilder.<init>(StringBuilder.java:101) ~[?:1.8.0_121]
    at com.fasterxml.jackson.core.util.TextBuffer.contentsAsString(TextBuffer.java:346) ~[jackson-core-2.8.6.jar:2.8.6]
    at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._finishAndReturnString(UTF8StreamJsonParser.java:2470) ~[jackson-core-2.8.6.jar:2.8.6]
    at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.getText(UTF8StreamJsonParser.java:315) ~[jackson-core-2.8.6.jar:2.8.6]
    at org.elasticsearch.common.xcontent.json.JsonXContentParser.text(JsonXContentParser.java:86) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readValue(AbstractXContentParser.java:369) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readMap(AbstractXContentParser.java:317) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.support.AbstractXContentParser.readMap(AbstractXContentParser.java:280) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.support.AbstractXContentParser.map(AbstractXContentParser.java:235) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.XContentHelper.convertToMap(XContentHelper.java:141) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.xcontent.XContentHelper.convertToMap(XContentHelper.java:114) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.action.index.IndexRequest.sourceAsMap(IndexRequest.java:346) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.ingest.PipelineExecutionService.innerExecute(PipelineExecutionService.java:164) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.ingest.PipelineExecutionService.access$000(PipelineExecutionService.java:41) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.ingest.PipelineExecutionService$2.doRun(PipelineExecutionService.java:88) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:638) ~[elasticsearch-5.3.2.jar:5.3.2]
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-5.3.2.jar:5.3.2]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[?:1.8.0_121]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[?:1.8.0_121]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
`
```

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