Phase2 failed – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” phase2 failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: recovery and indices.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “phase2 failed”classname  is RecoverySourceHandler.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

retentionLeases; mappingVersionOnPrimary; sendSnapshotStep);
 sendSnapshotStep.whenComplete(
 r -> IOUtils.close(phase2Snapshot);
 e -> {
 IOUtils.closeWhileHandlingException(phase2Snapshot);
 onFailure.accept(new RecoveryEngineException(shard.shardId(); 2; "phase2 failed"; e));
 }); 
 }; onFailure); 
 // Recovery target can trim all operations >= startingSeqNo as we have sent all these operations in the phase 2

 

Try AutoOps to detect and fix issues in your cluster:

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