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Briefly, this error occurs when OpenSearch is trying to recover a shard but the process is taking longer than expected. This could be due to a large amount of data, slow network, or insufficient resources. To resolve this issue, you can consider increasing the system resources, optimizing your network for faster data transfer, or reducing the size of your shards. Additionally, ensure that your system is not overloaded with other tasks that could slow down the recovery process.
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This guide will help you check for common problems that cause the log ” finalizing recovery took [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: recovery, indices.
Log Context
Log “finalizing recovery took [{}]” classname is RecoverySourceHandler.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
if (shard.indexSettings().isSegRepEnabled()) {
cancellableThreads.execute(recoveryTarget::forceSegmentFileSync);
}
}
stopWatch.stop();
logger.info("finalizing recovery took [{}]"; stopWatch.totalTime());
listener.onResponse(null);
}; listener::onFailure);
}
/**
