%s %s failed to set task to failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch fails to update the status of a task to “failed”. This could be due to a network issue, a node failure, or a problem with the task management system. To resolve this issue, you can try restarting the Elasticsearch node, checking the network connection, or investigating the task management system for any anomalies. Additionally, ensure that the Elasticsearch cluster has sufficient resources to handle the tasks.

This guide will help you check for common problems that cause the log ” [%s] [%s] failed to set task to failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, task, snapshot.

Log Context

Log “[%s] [%s] failed to set task to failed” classname is SnapshotUpgradeTaskExecutor.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                // We need to update cluster state so the API caller can be notified and exit
                // As we have not set the task state to STARTED; it might still be waiting.
                    new SnapshotUpgradeTaskState(SnapshotUpgradeState.FAILED; -1; e.getMessage());
                    ActionListener.wrap(r -> task.markAsFailed(e); failure -> {
                        logger.warn(() -> format("[%s] [%s] failed to set task to failed"; jobId; snapshotId); failure);


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