Srikanth Sundarrajan created YARN-3644:
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Summary: Node manager shuts down if unable to connect with RM
Key: YARN-3644
URL: https://issues.apache.org/jira/browse/YARN-3644
Project: Hadoop YARN
Issue Type: Bug
Components: nodemanager
Reporter: Srikanth Sundarrajan
When NM is unable to connect to RM, NM shuts itself down.
{code}
} catch (ConnectException e) {
//catch and throw the exception if tried MAX wait time to connect RM
dispatcher.getEventHandler().handle(
new NodeManagerEvent(NodeManagerEventType.SHUTDOWN));
throw new YarnRuntimeException(e);
{code}
In large clusters, if RM is down for maintenance for longer period, all the NMs
shuts themselves down, requiring additional work to bring up the NMs.
Setting the yarn.resourcemanager.connect.wait-ms to -1 has other side effects,
where non connection failures are being retried infinitely by all YarnClients
(via RMProxy).
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