Detected new primary with primary term global checkpoint max seq no – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-1.1

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Briefly, this error occurs when OpenSearch detects a new primary shard with a new primary term, global checkpoint, and max_seq_no. This could be due to a network partition, node failure, or manual intervention causing a new primary shard to be elected. To resolve this, ensure the cluster’s health is green and all nodes are properly communicating. If the issue persists, consider increasing the timeout settings or adjusting the shard allocation settings. Also, check for any hardware issues that might be causing node failures.

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This guide will help you check for common problems that cause the log ” detected new primary with primary term [{}]; global checkpoint [{}]; max_seq_no [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: shard, index.

Log Context

Log “detected new primary with primary term [{}]; global checkpoint [{}]; max_seq_no [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                    bumpPrimaryTerm(opPrimaryTerm; () -> {
                        updateGlobalCheckpointOnReplica(globalCheckpoint; "primary term transition");
                        final long currentGlobalCheckpoint = getLastKnownGlobalCheckpoint();
                        final long maxSeqNo = seqNoStats().getMaxSeqNo();
              "detected new primary with primary term [{}]; global checkpoint [{}]; max_seq_no [{}]";
                            opPrimaryTerm; currentGlobalCheckpoint; maxSeqNo);
                        if (currentGlobalCheckpoint 


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