# Logstash cannot retrieve license information from server **URL:** \ **Category:** Elasticsearch\ **Created:** [July 20, 2022, 2:03pm UTC](https://discuss.elastic.co/t/logstash-cannot-retrieve-license-information-from-server/310161 "2022-07-20T14:03:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![NadyLeez123](https://avatars.discourse-cdn.com/v4/letter/n/7bcc69/32.png) [@NadyLeez123](https://discuss.elastic.co/u/NadyLeez123)\ **Post date:** [July 20, 2022, 2:03pm UTC](https://discuss.elastic.co/t/logstash-cannot-retrieve-license-information-from-server/310161/1 "2022-07-20T14:03:07Z")
@sscarduzio There is more than a week that we are having issue with our ELK 7.15.1. Before that, everything were working well since months. Here is the problem: when logstash is stopped, the elasticsearch cluster is healthy, kibana is accessible. But once logstash is started, here is its outpout: ```auto [2022-07-20T09:03:41,867][INFO][logstash.javapipeline][main] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>2, "pipeline.batch.size"=>50, "pipeline.batch.delay"=>50, "pipeline.max_inflight"=>100, "pipeline.sources"=>["/etc/logstash/pipeline.global.conf"], :thread=>"#"} [2022-07-20T09:03:43,539][INFO][logstash.javapipeline][main] Pipeline Java execution initialization time {"seconds"=>1.67} [2022-07-20T09:03:43,669][INFO][logstash.inputs.beats][main] Starting input listener {:address=>"0.0.0.0:5044"} [2022-07-20T09:03:43,776][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,783][INFO][logstash.javapipeline][main] Pipeline started {"pipeline.id"=>"main"} [2022-07-20T09:03:43,790][INFO][logstash.agent] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]} [2022-07-20T09:03:43,797][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,799][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,825][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,826][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,836][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:43,837][INFO][filewatch.observingread][main] START, creating Discoverer, Watch with file and sincedb collections [2022-07-20T09:03:44,088][INFO][org.logstash.beats.Server][main] Starting server on port: 5044 [2022-07-20T09:04:05,392][ERROR][logstash.licensechecker.licensereader] Unable to retrieve license information from license server {:message=>"Got response code '401' contacting Elasticsearch at URL 'https://user:xxxxxx@master1:9200/_xpack'"} [2022-07-20T09:04:35,390][ERROR][logstash.licensechecker.licensereader] Unable to retrieve license information from license server {:message=>"Got response code '401' contacting Elasticsearch at URL 'https://user:xxxxxx@master1:9200/_xpack'"} [2022-07-20T09:04:44,198][WARN][logstash.outputs.elasticsearch][main] Marking url as dead. Last error: [LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError] Elasticsearch Unreachable: [https://user:xxxxxx@master2:9200/][Manticore::SocketTimeout] Read timed out {:url=>https://user:xxxxxx@master2:9200/, :error_message=>"Elasticsearch Unreachable: [https://user:xxxxxx@master2.gestion.mrqgest:9200/][Manticore::SocketTimeout] Read timed out", :error_class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError"} [2022-07-20T09:04:44,201][ERROR][logstash.outputs.elasticsearch][main] Attempted to send a bulk request but Elasticsearch appears to be unreachable or down {:message=>"Elasticsearch Unreachable: [https://user:xxxxxx@master2:9200/][Manticore::SocketTimeout] Read timed out", :exception=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :will_retry_in_seconds=>2} [2022-07-20T09:04:44,201][WARN][logstash.outputs.elasticsearch][main] Marking url as dead. Last error: [LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError] Elasticsearch Unreachable: [https://user:xxxxxx@master1:9200/][Manticore::SocketTimeout] Read timed out {:url=>https://user:xxxxxx@master1:9200/, :error_message=>"Elasticsearch Unreachable: [https://user:xxxxxx@master1:9200/][Manticore::SocketTimeout] Read timed out", :error_class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError"} [2022-07-20T09:04:44,206][ERROR][logstash.outputs.elasticsearch][main] Attempted to send a bulk request but Elasticsearch appears to be unreachable or down {:message=>"Elasticsearch Unreachable: [https://user:xxxxxx@master1:9200/][Manticore::SocketTimeout] Read timed out", :exception=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :will_retry_in_seconds=>2} [2022-07-20T09:04:45,686][WARN][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=>"https://user:xxxxxx@master1:9200/"} ``` Then, here is the elasticsearch output when logstash is started: ```auto org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/2/no master]; at org.elasticsearch.cluster.block.ClusterBlocks.globalBlockedException(ClusterBlocks.java:179) ~[elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.cluster.block.ClusterBlocks.globalBlockedRaiseException(ClusterBlocks.java:165) ~[elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.xpack.monitoring.action.TransportMonitoringBulkAction.doExecute(TransportMonitoringBulkAction.java:56) ~[?:?] at org.elasticsearch.xpack.monitoring.action.TransportMonitoringBulkAction.doExecute(TransportMonitoringBulkAction.java:36) ~[?:?] at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:173) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.action.support.ActionFilter$Simple.apply(ActionFilter.java:42) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:171) [elasticsearch-7.15.1.jar:7.15.1] at tech.beshu.ror.es.handler.RegularRequestHandler.proceed(RegularRequestHandler.scala:224) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.onAllow(RegularRequestHandler.scala:99) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.$anonfun$commitResult$1(RegularRequestHandler.scala:70) [readonlyrest-1.36.0_es7.15.1.jar:?] at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23) [scala-library-2.12.10.jar:?] at scala.util.Try$.apply(Try.scala:213) [scala-library-2.12.10.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.commitResult(RegularRequestHandler.scala:68) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.$anonfun$handle$2(RegularRequestHandler.scala:60) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.$anonfun$handle$2$adapted(RegularRequestHandler.scala:59) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.utils.ScalaOps$AutoCloseableOps$.bracket$extension(ScalaOps.scala:168) [core-1.36.0.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.$anonfun$handle$1(RegularRequestHandler.scala:59) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.handler.RegularRequestHandler.$anonfun$handle$1$adapted(RegularRequestHandler.scala:58) [readonlyrest-1.36.0_es7.15.1.jar:?] at monix.eval.Task$Map.apply(Task.scala:4514) [monix-eval_2.12-3.0.0.jar:3.0.0] at monix.eval.Task$Map.apply(Task.scala:4510) [monix-eval_2.12-3.0.0.jar:3.0.0] at monix.eval.internal.TaskRunLoop$.startLight(TaskRunLoop.scala:331) [monix-eval_2.12-3.0.0.jar:3.0.0] at monix.eval.Task.runAsyncOptF(Task.scala:811) [monix-eval_2.12-3.0.0.jar:3.0.0] at monix.eval.Task.runAsyncOpt(Task.scala:709) [monix-eval_2.12-3.0.0.jar:3.0.0] at monix.eval.Task.runAsync(Task.scala:659) [monix-eval_2.12-3.0.0.jar:3.0.0] at tech.beshu.ror.es.IndexLevelActionFilter.handleRequest(IndexLevelActionFilter.scala:136) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.IndexLevelActionFilter.proceedByRorEngine(IndexLevelActionFilter.scala:122) [readonlyrest-1.36.0_es7.15.1.jar:?] at tech.beshu.ror.es.IndexLevelActionFilter.$anonfun$apply$1(IndexLevelActionFilter.scala:107) [readonlyrest-1.36.0_es7.15.1.jar:?] at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23) [scala-library-2.12.10.jar:?] at tech.beshu.ror.utils.AccessControllerHelper$$anon$1.run(AccessControllerHelper.scala:25) [core-1.36.0.jar:?] at java.security.AccessController.doPrivileged(AccessController.java:318) [?:?] at tech.beshu.ror.utils.AccessControllerHelper$.doPrivileged(AccessControllerHelper.scala:24) [core-1.36.0.jar:?] at tech.beshu.ror.es.IndexLevelActionFilter.apply(IndexLevelActionFilter.scala:93) [readonlyrest-1.36.0_es7.15.1.jar:?] at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:171) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:149) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:77) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.client.node.NodeClient.executeLocally(NodeClient.java:90) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.client.node.NodeClient.doExecute(NodeClient.java:70) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:402) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:59) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.xpack.monitoring.rest.action.RestMonitoringBulkAction.lambda$doPrepareRequest$0(RestMonitoringBulkAction.java:102) [x-pack-monitoring-7.15.1.jar:7.15.1] at org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:106) [elasticsearch-7.15.1.jar:7.15.1] at tech.beshu.ror.es.ReadonlyRestPlugin.$anonfun$getRestHandlerWrapper$2(ReadonlyRestPlugin.scala:238) [readonlyrest-1.36.0_es7.15.1.jar:?] at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:275) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.rest.RestController.tryAllHandlers(RestController.java:343) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:196) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.http.AbstractHttpServerTransport.dispatchRequest(AbstractHttpServerTransport.java:348) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.http.AbstractHttpServerTransport.handleIncomingRequest(AbstractHttpServerTransport.java:413) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.http.AbstractHttpServerTransport.incomingRequest(AbstractHttpServerTransport.java:330) [elasticsearch-7.15.1.jar:7.15.1] at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:31) [transport-netty4-client-7.15.1.jar:7.15.1] at org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:17) [transport-netty4-client-7.15.1.jar:7.15.1] at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.channelRead(Netty4HttpPipeliningHandler.java:47) [transport-netty4-client-7.15.1.jar:7.15.1] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) [netty-handler-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1372) [netty-handler-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1235) [netty-handler-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1284) [netty-handler-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) [netty-codec-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:620) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:583) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) [netty-transport-4.1.69.Final.jar:4.1.69.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [netty-common-4.1.69.Final.jar:4.1.69.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.69.Final.jar:4.1.69.Final] at java.lang.Thread.run(Thread.java:833) [?:?] ``` Any idea about this issue? Note: in kibana.yml, we have : ```auto xpack.monitoring.enabled: true ``` and in logstash pipeline: ```auto ssl_certificate_verification => false ``` Note that everything were working well since months Thanks ---
**Author:** ![leandrojmp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/leandrojmp/32/107231_2.png) [@leandrojmp](https://discuss.elastic.co/u/leandrojmp)\ **Post date:** [July 20, 2022, 2:37pm UTC](https://discuss.elastic.co/t/logstash-cannot-retrieve-license-information-from-server/310161/2 "2022-07-20T14:37:07Z")
> [@NadyLeez123](#): > > `org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/2/no master]` Is your Elasticsearch cluster running? This log says that there is no master available. What is the result when you make a curl to `https://master1:9200` ? ---
**Author:** ![NadyLeez123](https://avatars.discourse-cdn.com/v4/letter/n/7bcc69/32.png) [@NadyLeez123](https://discuss.elastic.co/u/NadyLeez123)\ **Post date:** [July 20, 2022, 6:01pm UTC](https://discuss.elastic.co/t/logstash-cannot-retrieve-license-information-from-server/310161/3 "2022-07-20T18:01:11Z")
Yes the elasticsearch cluster is running. The problem occurs when I start logstash. If I stop Logstash, the `org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/2/no master]` error disappears in elasticsearch logs. I just stopped logstash, and everything is fine: ![image](https://us1.discourse-cdn.com/elastic/original/3X/d/f/dfbc934da0eb5fcbe840c28e3f335b6cdc2c0124.png) curl to `https://master1:9200`: ```auto { "cluster_name" : "elasticsearch_xxxxx", "status" : "green", "timed_out" : false, "number_of_nodes" : 8, "number_of_data_nodes" : 6, "active_primary_shards" : 4237, "active_shards" : 4850, "relocating_shards" : 0, "initializing_shards" : 0, "unassigned_shards" : 0, "delayed_unassigned_shards" : 0, "number_of_pending_tasks" : 0, "number_of_in_flight_fetch" : 0, "task_max_waiting_in_queue_millis" : 0, "active_shards_percent_as_number" : 100.0 } ``` Then, if I start Logstash, here is what curl to `https://master1:9200` gives: ```auto { "error" : { "root_cause" : [ { "type" : "master_not_discovered_exception", "reason" : null } ], "type" : "master_not_discovered_exception", "reason" : null }, "status" : 503 } ``` So the problem occurs when logstash is running ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 17, 2022, 6:01pm UTC](https://discuss.elastic.co/t/logstash-cannot-retrieve-license-information-from-server/310161/4 "2022-08-17T18:01:14Z")
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