Task doesn t support this operation – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when you’re trying to perform an operation on a task in OpenSearch that isn’t supported by the task’s current state or type. This could be due to a programming error or a misuse of the OpenSearch API. To resolve this issue, you should first verify the type and state of the task. Ensure that the operation you’re trying to perform is valid for that task. If the error persists, review your code to ensure you’re using the OpenSearch API correctly.

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This guide will help you check for common problems that cause the log ” task [{}] doesn’t support this operation ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: task.

Log Context

Log “task [{}] doesn’t support this operation” class name is TransportTasksAction.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 Task task = taskManager.getTask(request.getTaskId().getId());
 if (task != null) {
 if (request.match(task)) {
 operation.accept((OperationTask) task);
 } else {
 throw new ResourceNotFoundException("task [{}] doesn't support this operation"; request.getTaskId());
 } else {
 throw new ResourceNotFoundException("task [{}] is missing"; request.getTaskId());
 } else {


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