Unexpected error during the primary phase for action request – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch encounters an unexpected issue while processing a request during the primary phase. This could be due to a variety of reasons such as network issues, node failures, or data inconsistencies. To resolve this issue, you can try the following: 1) Check the health of your nodes and network, 2) Verify the integrity of your data, 3) Review your Elasticsearch logs for more detailed error information, 4) Retry the failed operation, and 5) If the problem persists, consider restarting your Elasticsearch cluster.

This guide will help you check for common problems that cause the log ” unexpected error during the primary phase for action [{}]; request [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: replication and request.

Log Context

Log “unexpected error during the primary phase for action [{}]; request [{}]” classname is TransportReplicationAction.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 assert false : "finishAsFailed called but operation is already finished";
            }
        }

        void finishWithUnexpectedFailure(Throwable failure) {
            logger.warn("unexpected error during the primary phase for action [{}]; request [{}]"; failure; actionName; request);
            if (finished.compareAndSet(false; true)) {
                setPhase(task; "failed");
                listener.onFailure(failure);
            } else {
                assert false : "finishWithUnexpectedFailure called but operation is already finished";




 

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