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Briefly, this error occurs when OpenSearch tries to update the status of a task, but the allocation ID of the task doesn’t match the expected ID. This could be due to a task being reallocated to a different node or a node restart. To resolve this issue, you can try to manually cancel the task using the task management API. If the problem persists, consider checking the cluster health and ensure that there are no network partitions or node failures. If necessary, you may need to restart the affected nodes.
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This guide will help you check for common problems that cause the log ” The task [{}] with id [{}] was found but it has a different allocation id [{}]; status is not updated ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: task, allocation, persistent.
Overview
In OpenSearch, persistent refers to cluster settings that persist across cluster restarts. This setting is used in Cluster Update API calls. Persistent settings can also be configured in the opensearch.yml file.
Examples
## enable shard routing
PUT /_cluster/settings
{
"persistent" : {
"cluster.routing.allocation.enable" : "all"
}
}
## enable rebalancing of shards
PUT /_cluster/settings
{
"persistent" : {
"cluster.routing.rebalance.enable" : "all"
}
}
## limit the heap size for fielddata
PUT /_cluster/settings
{
"persistent" : {
“indices.breaker.fielddata.limit”: "30%"
}
}Log Context
Log “The task [{}] with id [{}] was found but it has a different allocation id [{}]; status is not updated” classname is PersistentTasksClusterService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
if (tasksInProgress.hasTask(id; allocationId)) {
tasksInProgress.removeTask(id);
return update(currentState; tasksInProgress);
} else {
if (tasksInProgress.hasTask(id)) {
logger.warn("The task [{}] with id [{}] was found but it has a different allocation id [{}]; status is not updated";
PersistentTasksCustomMetadata.getTaskWithId(currentState; id).getTaskName(); id; allocationId);
} else {
logger.warn("The task [{}] wasn't found; status is not updated"; id);
}
throw new ResourceNotFoundException("the task with id [" + id + "] and allocation id [" + allocationId + "] not found");
