Briefly, this error occurs when Elasticsearch encounters an issue while trying to refresh the cluster state after a new master node has been assigned. This could be due to network issues, node failures, or configuration problems. To resolve this issue, you can try the following: 1) Check the network connectivity between the nodes; 2) Verify the health status of the nodes in the cluster; 3) Review the Elasticsearch configuration for any inconsistencies; 4) If the problem persists, consider restarting the Elasticsearch service or the affected nodes.
This guide will help you check for common problems that cause the log ” unexpected failure while attempting asynchronous refresh on new master assignment ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, master, refresh.
Log Context
Log “unexpected failure while attempting asynchronous refresh on new master assignment” classname is MlMemoryTracker.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
public void onMaster() {
isMaster = true;
try {
asyncRefresh();
} catch (Exception ex) {
logger.warn("unexpected failure while attempting asynchronous refresh on new master assignment"; ex);
}
logger.trace("ML memory tracker on master");
}
@Override
