mirror of
https://github.com/elastic/elasticsearch.git
synced 2025-06-28 17:34:17 -04:00
942e5fd9fc
* Update troubleshooting.asciidoc Adding items into the troubleshooting guide * Resolve conflicts * Reorganizes troubleshooting links Co-authored-by: Abdon Pijpelink <abdon.pijpelink@elastic.co>
50 lines
No EOL
2.2 KiB
Text
50 lines
No EOL
2.2 KiB
Text
[[fix-common-cluster-issues]]
|
|
== Fix common cluster issues
|
|
|
|
This guide describes how to fix common errors and problems with {es} clusters.
|
|
|
|
<<disk-usage-exceeded,Error: disk usage exceeded flood-stage watermark, index has read-only-allow-delete block>>::
|
|
This error indicates a data node is critically low on disk space and has reached
|
|
the flood-stage disk usage watermark.
|
|
|
|
<<circuit-breaker-errors,Circuit breaker errors>>::
|
|
{es} uses circuit breakers to prevent nodes from running out of JVM heap memory.
|
|
If Elasticsearch estimates an operation would exceed a circuit breaker, it stops
|
|
the operation and returns an error.
|
|
|
|
<<high-cpu-usage,High CPU usage>>::
|
|
The most common causes of high CPU usage and their solutions.
|
|
|
|
<<high-jvm-memory-pressure,High JVM memory pressure>>::
|
|
High JVM memory usage can degrade cluster performance and trigger circuit
|
|
breaker errors.
|
|
|
|
<<red-yellow-cluster-status,Red or yellow cluster status>>::
|
|
A red or yellow cluster status indicates one or more shards are missing or
|
|
unallocated. These unassigned shards increase your risk of data loss and can
|
|
degrade cluster performance.
|
|
|
|
<<rejected-requests,Rejected requests>>::
|
|
When {es} rejects a request, it stops the operation and returns an error with a
|
|
`429` response code.
|
|
|
|
<<task-queue-backlog,Task queue backlog>>::
|
|
A backlogged task queue can prevent tasks from completing and put the cluster
|
|
into an unhealthy state.
|
|
|
|
<<diagnose-unassigned-shards,Diagnose unassigned shards>>::
|
|
There are multiple reasons why shards might get unassigned, ranging from
|
|
misconfigured allocation settings to lack of disk space.
|
|
|
|
<<cluster-fault-detection-troubleshooting,Troubleshooting an unstable cluster>>::
|
|
A cluster in which nodes leave unexpectedly is unstable and can create several
|
|
issues.
|
|
|
|
include::common-issues/disk-usage-exceeded.asciidoc[]
|
|
include::common-issues/circuit-breaker-errors.asciidoc[]
|
|
include::common-issues/high-cpu-usage.asciidoc[]
|
|
include::common-issues/high-jvm-memory-pressure.asciidoc[]
|
|
include::common-issues/red-yellow-cluster-status.asciidoc[]
|
|
include::common-issues/rejected-requests.asciidoc[]
|
|
include::common-issues/task-queue-backlog.asciidoc[]
|
|
include::common-issues/diagnose-unassigned-shards.asciidoc[] |