Recovery failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-6.8

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Briefly, this error occurs when Elasticsearch encounters issues during the recovery process of a shard. This could be due to insufficient disk space, network connectivity issues, or corrupted indices. To resolve this, you can try freeing up disk space, checking network connectivity, or using the Elasticsearch Check Index API to identify and fix corrupted indices. If the issue persists, consider increasing the recovery limit or adjusting the cluster settings.

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

Log Context

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

        } else {
            if (recovered.compareAndSet(false; true)) {
                threadPool.generic().execute(new AbstractRunnable() {
                    @Override
                    public void onFailure(Exception e) {
                        logger.warn("Recovery failed"; e);
                        // we reset `recovered` in the listener don't reset it here otherwise there might be a race
                        // that resets it to false while a new recover is already running?
                        recoveryListener.onFailure("state recovery failed: " + e.getMessage());
                    }

 

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