Upgrade task reassigned to another node while failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.16-8.9

Briefly, this error occurs when an Elasticsearch upgrade task is reassigned to another node due to a failure in the current node. This could be due to network issues, node failure, or resource constraints. To resolve this issue, you can try the following: 1) Check the health of your nodes and ensure they are functioning properly. 2) Verify your network connectivity. 3) Ensure your nodes have sufficient resources to handle the upgrade task. 4) If the problem persists, consider manually assigning the task to a specific node.

This guide will help you check for common problems that cause the log ” [{}] [{}] upgrade task reassigned to another node while failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, task, upgrade, snapshot, node.

Log Context

Log “[{}] [{}] upgrade task reassigned to another node while failed” classname is SnapshotUpgradeTaskExecutor.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            deleteSnapshotAndFailTask(task; params.getJobId(); params.getSnapshotId());
        // if the task is failed; that means it was set that way purposefully. So; assuming there is no bad snapshot state
        if (SnapshotUpgradeState.FAILED.equals(jobState)) {
            logger.warn("[{}] [{}] upgrade task reassigned to another node while failed"; params.getJobId(); params.getSnapshotId());
                new ElasticsearchStatusException(
                    "Task to upgrade job [{}] snapshot [{}] got reassigned while failed. Reason [{}]";


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