Failed to prepare shard for recovery – Elasticsearch Error How To Solve Related Issues



Failed to prepare shard for recovery – Elasticsearch Error How To Solve Related Issues

Opster Team

July-20, Version: 1.7-8.0

 

Before you read this guide, we recommend you run the Elasticsearch Error Check-Up which detects issues in ES causing log errors (free tool that requires no installation). 

This guide will help you check for common problems that cause the log “failed to prepare shard for recovery” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: recovery, indices, shard.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations how to resolve them (join over 700 users who use this free tool).

Log Context

Log”failed to prepare shard for recovery”classname  is PeerRecoveryTargetService.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

actionName = PeerRecoverySourceService.Actions.START_RECOVERY;
  } catch (final Exception e) {
  // this will be logged as warning later on...
  logger.trace("unexpected error while preparing shard for peer recovery; failing recovery"; e);
  onGoingRecoveries.failRecovery(recoveryId;
  new RecoveryFailedException(recoveryTarget.state(); "failed to prepare shard for recovery"; e); true);
  return;
  }
  logger.trace("{} starting recovery from {}"; startRequest.shardId(); startRequest.sourceNode());
  } else {
  startRequest = preExistingRequest;

 





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