Log Failed to reassign persistent tasks – How To Solve Related Issues

Log Failed to reassign persistent tasks – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0


Before you read this guide, we recommend you run the Elasticsearch Error Check-Up which detects issues in ES that cause log errors. It’s a free tool that requires no installation and takes 2 minutes to complete.

This guide will help you check for common problems that cause the log ” Failed to reassign persistent tasks ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: cluster and persistent.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them. Among the dozens of checks included are: shards sizes, thread pools, management queue size, search errors, circuit breakers and many more (join over 700 users who use this free tool).

Log Context

Log “Failed to reassign persistent tasks” classname is PersistentTasksClusterService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 return reassignTasks(currentState);

            public void onFailure(String source; Exception e) {
                logger.warn("failed to reassign persistent tasks"; e);
                // There must be a task that's worth rechecking because there was one
                // that caused this method to be called and the method failed to assign it

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Github Issue Number 35792

2 Github Issue Number 37545

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