elk 中发现elasticsearch 日志中报错：

[2022-01-18T07:41:43,690][WARN ][o.e.x.m.e.l.LocalExporter] [node-226] unexpected error while indexing monitoring document
org.elasticsearch.xpack.monitoring.exporter.ExportException: ClusterBlockException[blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];]
    at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.lambda$throwExportException$2(LocalBulk.java:128) ~[?:?]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_171]
    at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_171]
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:1.8.0_171]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[?:1.8.0_171]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[?:1.8.0_171]
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:1.8.0_171]
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:1.8.0_171]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_171]
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[?:1.8.0_171]
    at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.throwExportException(LocalBulk.java:129) ~[?:?]
    at org.elasticsearch.xpack.monitoring.exporter.local.LocalBulk.lambda$doFlush$0(LocalBulk.java:111) ~[?:?]
    at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:60) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.ContextPreservingActionListener.onResponse(ContextPreservingActionListener.java:43) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction$1.onResponse(TransportAction.java:85) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction$1.onResponse(TransportAction.java:81) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction$BulkRequestModifier.lambda$wrapActionListenerIfNeeded$0(TransportBulkAction.java:607) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:60) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction$BulkOperation$1.finishHim(TransportBulkAction.java:414) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction$BulkOperation$1.onFailure(TransportBulkAction.java:409) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction$1.onFailure(TransportAction.java:91) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.finishAsFailed(TransportReplicationAction.java:901) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.handleBlockException(TransportReplicationAction.java:824) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.handleBlockExceptions(TransportReplicationAction.java:812) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.doRun(TransportReplicationAction.java:710) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction.doExecute(TransportReplicationAction.java:169) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction.doExecute(TransportReplicationAction.java:97) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:167) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.apply(SecurityActionFilter.java:126) ~[?:?]
    at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:165) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:139) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:81) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction$BulkOperation.doRun(TransportBulkAction.java:384) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction.executeBulk(TransportBulkAction.java:496) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction.executeIngestAndBulk(TransportBulkAction.java:243) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction.doExecute(TransportBulkAction.java:169) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.bulk.TransportBulkAction.lambda$processBulkIndexIngestRequest$4(TransportBulkAction.java:549) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.ingest.IngestService$4.doRun(IngestService.java:417) [elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:723) [elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.5.0.jar:6.5.0]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]
Caused by: org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];
    at org.elasticsearch.cluster.block.ClusterBlocks.indexBlockedException(ClusterBlocks.java:183) ~[elasticsearch-6.5.0.jar:6.5.0]
    at org.elasticsearch.action.support.replication.TransportReplicationAction$ReroutePhase.handleBlockExceptions(TransportReplicationAction.java:810) ~[elasticsearch-6.5.0.jar:6.5.0]
    ... 21 more

最后看到了他人的分享，解决了问题。

curl -XPUT -H "Content-Type: application/json" http://192.167.21.2:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'