Task with id ” + taskId + ” already exist – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” task with id ” + taskId + ” already exist ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: task and persistent.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “task with id {” + taskId + “} already exist”classname  is PersistentTasksClusterService.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

clusterService.submitStateUpdateTask("create persistent task"; new ClusterStateUpdateTask() {
 public ClusterState execute(ClusterState currentState) {
 PersistentTasksCustomMetadata.Builder builder = builder(currentState);
 if (builder.hasTask(taskId)) {
 throw new ResourceAlreadyExistsException("task with id {" + taskId + "} already exist");
 PersistentTasksExecutor taskExecutor = registry.getPersistentTaskExecutorSafe(taskName);
 taskExecutor.validate(taskParams; currentState);


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