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Briefly, this error occurs when Elasticsearch successfully recovers indices and updates the cluster state after a node or cluster failure. It’s not an error but an informational message indicating that the recovery process has completed successfully. If you’re seeing this frequently, it might indicate instability in your cluster. To resolve this, ensure your nodes have sufficient resources (CPU, memory, disk space), check for network connectivity issues, and consider adjusting your shard allocation settings to prevent overloading certain nodes.
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This guide will help you check for common problems that cause the log ” recovered [{}] indices into cluster_state ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices.
Log Context
Log “recovered [{}] indices into cluster_state” classname is GatewayService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
);
}
@Override
public void clusterStateProcessed(final ClusterState oldState; final ClusterState newState) {
logger.info("recovered [{}] indices into cluster_state"; newState.metadata().indices().size());
// reset flag even though state recovery completed; to ensure that if we subsequently become leader again based on a
// not-recovered state; that we again do another state recovery.
rerouteService.reroute("state recovered"; Priority.NORMAL; ActionListener.running(GatewayService.this::resetRecoveredFlags));
}
