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Briefly, this error occurs when OpenSearch tries to send a notification for a specific task, but fails. This could be due to network issues, incorrect configuration, or the notification service being unavailable. To resolve this, you can check the network connectivity, verify the configuration settings for the notification service, and ensure the notification service is up and running. Additionally, check the task ID for any inconsistencies or errors. If the problem persists, consider reviewing the OpenSearch logs for more detailed error information.
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This guide will help you check for common problems that cause the log ” notification for task [{}] with id [{}] failed ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: task, 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 “notification for task [{}] with id [{}] failed” classname is PersistentTasksNodeService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
}
@Override
public void onFailure(Exception notificationException) {
notificationException.addSuppressed(originalException);
logger.warn(new ParameterizedMessage("notification for task [{}] with id [{}] failed";
taskInProgress.getTaskName(); taskInProgress.getAllocationId()); notificationException);
}
});
}
