Trying to update state on task with unexpected allocation id – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch attempts to update the state of a task with an allocation ID that it doesn’t recognize. This could be due to a node failure or a network partition. To resolve this issue, you can try restarting the Elasticsearch node, or if the problem persists, you may need to reindex your data. Additionally, ensure that your cluster health is green and that all nodes are properly connected. Regularly monitoring your cluster and nodes can help prevent such issues.

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This guide will help you check for common problems that cause the log ” trying to update state on task {} with unexpected allocation id {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: task, allocation, persistent.

Log Context

Log “trying to update state on task {} with unexpected allocation id {}” classname is PersistentTasksClusterService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                PersistentTasksCustomMetadata.Builder tasksInProgress = builder(currentState);
                if (tasksInProgress.hasTask(taskId; taskAllocationId)) {
                    return update(currentState; tasksInProgress.updateTaskState(taskId; taskState));
                } else {
                    if (tasksInProgress.hasTask(taskId)) {
                        logger.warn("trying to update state on task {} with unexpected allocation id {}"; taskId; taskAllocationId);
                    } else {
                        logger.warn("trying to update state on non-existing task {}"; taskId);
                    }
                    throw new ResourceNotFoundException("the task with id {} and allocation id {} doesn't exist"; taskId; taskAllocationId);
                }

 

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