# Issues with converting standalone instance to cluster

**URL:** <https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071>\
**Category:** Elasticsearch\
**Created:** [June 15, 2023, 9:31am UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071 "2023-06-15T09:31:29Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![111407](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/111407/32/78114_2.png) [@111407](https://discuss.elastic.co/u/111407)\
**Post date:** [June 15, 2023, 9:31am UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/1 "2023-06-15T09:31:29Z")

</div>

Hi,  
I cannot convert my standalone instance to cluster.  
Initially, I tried just to copy elastic data dir to new nodes, but after some googling I realized it won't work.  
Then I just brought up elastic daemon on new nodes and let it sync by its own, however it resulted to tons of error and indices went to readnonly.  
During next attempt, I restarted master node on nonstandard port in order to exсlude any new data being written before all nodes are in sync. This attempt was also unsuccessful.  
This is what I see in master log:

```auto
[2023-06-15T04:34:04,252][WARN][r.suppressed] [sd-4531-6c55.my.doman] path: /app-system-metrics-2023.06.15/doc, params: {index=app-system-metrics-2023.06.15, type=doc}
org.elasticsearch.action.UnavailableShardsException: [app-system-metrics-2023.06.15][3] primary shard is not active Timeout: [1m], request: [BulkShardRequest [[app-system-metrics-2023.06.15][3]] containing [index {[app-system-metrics-2023.06.15][doc][R2gvvogBZBBt2Z8_zh_1], source[{"application":"cloud-bridge-dh","timestamp":"2023-06-15T08:33:04.227763Z","sysCpuUsg":29.798766294867633,"appCpuUsg":0.026412955554699576,"jvmMemUsed":4677,"hostName":"isgswpid6n1.my.domain","jvmMemFree":3515,"jvmMemTotal":8192,"pid":"32906@isgswpid6n1.nam.nsroot.net","mode":"jms","dataType":"pmm","processingMode":"default,datahighway","threadsNum":287}]}]]
        at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.retryBecauseUnavailable(TransportReplicationAction.java:985) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.retryIfUnavailable(TransportReplicationAction.java:862) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.doRun(TransportReplicationAction.java:814) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase$2.onTimeout(TransportReplicationAction.java:945) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:322) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:249) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.service.ClusterApplierService$NotifyTimeout.run(ClusterApplierService.java:564) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) [elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_321]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_321]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_321]
[2023-06-15T04:44:43,446][WARN][r.suppressed] [sd-4531-6c55.my.domain] path: /app-system-metrics-2023.06.15/doc, params: {index=app-system-metrics-2023.06.15, type=doc}
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException: failed to process cluster event (put-mapping) within 30s
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$0(MasterService.java:127) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_321]
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$1(MasterService.java:126) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_321]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_321]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_321]

```

Logs of new node 1

```auto
[2023-06-15T04:17:37,947][WARN][o.e.c.NodeConnectionsService] [sd-c3d2-b7ca.my.domain] failed to connect to node {sd-4531-6c55.my.domain}{SJy6ieIMQ5C41td7c3t1Hw}{IF55uJx9Sxa7w8xn953irg}{sd-4531-6c55.my.domain}{xxx.xxx.189.103:9300}{ml.machine_memory=135028703232, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true} (tried [7] times)
org.elasticsearch.transport.ConnectTransportException: [sd-4531-6c55.my.domain][xxx.xxx.189.103:9300] handshake failed. unexpected remote node {sd-4531-6c55.my.domain}{SJy6ieIMQ5C41td7c3t1Hw}{vhQiTmAGTF68awUB3kVnLQ}{sd-4531-6c55.my.domain}{xxx.xxx.189.103:9300}{ml.machine_memory=135028703232, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true}
        at org.elasticsearch.transport.TransportService.lambda$connectionValidator$4(TransportService.java:350) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.transport.ConnectionManager.connectToNode(ConnectionManager.java:105) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:342) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.transport.TransportService.connectToNode(TransportService.java:329) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.NodeConnectionsService.validateAndConnectIfNeeded(NodeConnectionsService.java:154) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.NodeConnectionsService$ConnectionChecker.doRun(NodeConnectionsService.java:181) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:751) [elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_361]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_361]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_361]
[2023-06-15T04:17:38,898][WARN][o.e.c.s.ClusterApplierService] [sd-c3d2-b7ca.my.domain] cluster state applier task [apply cluster state (from master [master {sd-07a1-ae2b.my.domain}{0a4UMLAMR56HqeuQzZLn_w}{WbKhroR5QaygUZUPDyAmsQ}{sd-07a1-ae2b.my.domain}{xxx.xxx.89:9300}{ml.machine_memory=67387813888, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true} committed version [8970]])] took [52.9s] above the warn threshold of 30s

```

Logs of new node 2

```auto
[2023-06-15T05:12:07,281][DEBUG][o.e.a.b.TransportShardBulkAction] [sd-07a1-ae2b.my.domain] [ss-rest-2023.06.15][0] failed to execute bulk item (index) index {[ss-rest-2023.06.15][doc][U4BSvogBZBBt2Z8_pMH0], source[{"statusCode":404,"timestamp":"2023-06-15T09:11:07
.233491Z","url":"/matchingcriteriastream/products/25810505528337/smcp1/criteria","host":"isgswapd6n2.my.domain:9000","msgCount":0,"subscriptionName":"","subjectId":"","requestCount":3,"avgMongoQueryLatency":21.333333333333332,"pid":"28528@isgswapd6n2.nam.nsroot.net","avgMsgSize":0.0,"requestMethod":"PUT","avgResponseLatency":21.333333333333332,"subscriptionType":"","destination":"rest"}]}
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException: failed to process cluster event (put-mapping) within 30s
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$0(MasterService.java:127) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_361]
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$1(MasterService.java:126) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_361]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_361]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_361]
[2023-06-15T05:13:18,587][DEBUG][o.e.a.a.i.m.p.TransportPutMappingAction] [sd-07a1-ae2b.my.domain] failed to put mappings on indices [[[cloud-bridge-generic-2023.06.15/EjjeqpF9TXiBwkO1NziWfA]]], type [doc]
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException: failed to process cluster event (put-mapping) within 30s
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$0(MasterService.java:127) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_361]
        at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$1(MasterService.java:126) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) [elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_361]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_361]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_361]

```

ES version: 6.8.8  
elasticsearch.yml

```auto
cluster.name: ELK_SIT
path.data: /opt/elasticdata
network.host: ${HOSTNAME}
discovery.zen.ping.unicast.hosts: sd-4531-6c55,sd-c3d2-b7ca,sd-07a1-ae2b
node.name: ${HOSTNAME}
discovery.zen.minimum_master_nodes: 1
xpack.security.transport.ssl.enabled: true
xpack.security.enabled: true
bootstrap.system_call_filter: false
xpack.ssl.cipher_suites: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256

xpack.security.transport.ssl.verification_mode: none
xpack.security.transport.ssl.keystore.path: certs/elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: certs/elastic-certificates.p12

```

---

<div class="post-metadata">

**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:** [June 15, 2023, 11:54am UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/2 "2023-06-15T11:54:43Z")

</div>

What is the config for your other nodes?

---

<div class="post-metadata">

**Author:** ![111407](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/111407/32/78114_2.png) [@111407](https://discuss.elastic.co/u/111407)\
**Post date:** [June 15, 2023, 12:07pm UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/3 "2023-06-15T12:07:24Z")

</div>

All nodes run the same config

---

<div class="post-metadata">

**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:** [June 15, 2023, 12:13pm UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/4 "2023-06-15T12:13:43Z")

</div>

> [@111407](#):
>
> All nodes run the same config

Then that is the issue, you can't have `discovery.zen.minimum_master_nodes` set to `1` if you want to form a cluster.

This setting basically you tell your nodes that 1 master node is enough to form the cluster, if for some reason there is any communication issue between them, each one of them will form a single-node cluster, this is an issue know as _split brain_.

You can read more about it in the [documentation](https://www.elastic.co/guide/en/elasticsearch/reference/6.8/discovery-settings.html) and a explanation about split brain can be found in the [documentation as well](https://www.elastic.co/guide/en/elasticsearch/reference/6.8/modules-node.html#split-brain).

Stop all your nodes and change the setting to this:

```auto
discovery.zen.minimum_master_nodes: 2

```

Also, any reason to use 6.8.8? This is pretty old and way past its EOL.

---

<div class="post-metadata">

**Author:** ![111407](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/111407/32/78114_2.png) [@111407](https://discuss.elastic.co/u/111407)\
**Post date:** [June 15, 2023, 7:11pm UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/5 "2023-06-15T19:11:03Z")

</div>

Looks like it worked, thank you! However now log of master node are flooded with such messages:

```auto
[2023-06-15T15:02:17,362][DEBUG][o.e.a.a.i.s.TransportIndicesStatsAction] [sd-4531-6c55.my.domain] failed to execute [indices:monitor/stats] on node [SJy6ieIMQ5C41td7c3t1Hw]
org.elasticsearch.transport.SendRequestTransportException: [sd-4531-6c55.my.domain][xxx.xxx.189.103:9300][indices:monitor/stats[n]]
        at org.elasticsearch.transport.TransportService.sendRequestInternal(TransportService.java:656) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor.sendWithUser(SecurityServerTransportInterceptor.java:155) ~[?:?]
        at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor.access$400(SecurityServerTransportInterceptor.java:52) ~[?:?]
        at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$1.sendRequest(SecurityServerTransportInterceptor.java:133) ~[?:?]
        at org.elasticsearch.transport.TransportService.sendRequest(TransportService.java:555) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.transport.TransportService.sendRequest(TransportService.java:522) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction$AsyncAction.sendNodeRequest(TransportBroadcastByNodeAction.java:324) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction$AsyncAction.start(TransportBroadcastByNodeAction.java:313) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:236) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.broadcast.node.TransportBroadcastByNodeAction.doExecute(TransportBroadcastByNodeAction.java:78) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:167) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.lambda$apply$0(SecurityActionFilter.java:84) ~[?:?]
        at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.lambda$authorizeRequest$4(SecurityActionFilter.java:170) ~[?:?]
        at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.authz.AuthorizationService.authorizeSystemUser(AuthorizationService.java:377) ~[?:?]
        at org.elasticsearch.xpack.security.authz.AuthorizationService.authorize(AuthorizationService.java:186) ~[?:?]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.authorizeRequest(SecurityActionFilter.java:170) ~[?:?]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.lambda$applyInternal$3(SecurityActionFilter.java:156) ~[?:?]
        at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$writeAuthToContext$24(AuthenticationService.java:565) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.writeAuthToContext(AuthenticationService.java:574) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$handleNullToken$18(AuthenticationService.java:467) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.handleNullToken(AuthenticationService.java:474) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeToken(AuthenticationService.java:356) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$extractToken$9(AuthenticationService.java:327) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.extractToken(AuthenticationService.java:345) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$checkForApiKey$3(AuthenticationService.java:288) ~[?:?]
        at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.authc.ApiKeyService.authenticateWithApiKeyIfPresent(ApiKeyService.java:351) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.checkForApiKey(AuthenticationService.java:269) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$authenticateAsync$0(AuthenticationService.java:252) ~[?:?]
        at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:61) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.xpack.security.authc.TokenService.getAndValidateToken(TokenService.java:330) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$authenticateAsync$2(AuthenticationService.java:248) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$lookForExistingAuthentication$6(AuthenticationService.java:306) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lookForExistingAuthentication(AuthenticationService.java:317) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.authenticateAsync(AuthenticationService.java:244) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.access$000(AuthenticationService.java:196) ~[?:?]
        at org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:139) ~[?:?]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.applyInternal(SecurityActionFilter.java:153) ~[?:?]
        at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.apply(SecurityActionFilter.java:105) ~[?:?]
        at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:165) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:139) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:81) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.client.node.NodeClient.executeLocally(NodeClient.java:87) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.client.node.NodeClient.doExecute(NodeClient.java:76) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:403) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.client.support.AbstractClient$IndicesAdmin.execute(AbstractClient.java:1269) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.client.support.AbstractClient$IndicesAdmin.stats(AbstractClient.java:1591) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.InternalClusterInfoService.updateIndicesStats(InternalClusterInfoService.java:266) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.InternalClusterInfoService.refresh(InternalClusterInfoService.java:323) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.InternalClusterInfoService.maybeRefresh(InternalClusterInfoService.java:273) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.InternalClusterInfoService.access$200(InternalClusterInfoService.java:65) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cluster.InternalClusterInfoService$SubmitReschedulingClusterInfoUpdatedJob.lambda$run$0(InternalClusterInfoService.java:220) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) ~[elasticsearch-6.8.8.jar:6.8.8]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_321]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_321]
        at java.lang.Thread.run(Thread.java:750) [?:1.8.0_321]
Caused by: org.elasticsearch.transport.TransportException: TransportService is closed stopped can't send request
        at org.elasticsearch.transport.TransportService.sendRequestInternal(TransportService.java:638) ~[elasticsearch-6.8.8.jar:6.8.8]
        ... 58 more

```

Could you pls advise why I get this?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 13, 2023, 7:11pm UTC](https://discuss.elastic.co/t/issues-with-converting-standalone-instance-to-cluster/336071/6 "2023-07-13T19:11:45Z")

</div>

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