[jira] [Created] (YARN-11355) YARN Client Failovers immediately to rm2 but takes ~30000ms to rm3

["Prabhu Joseph (Jira)" <ji...@apache.org>]

Prabhu Joseph created YARN-11355:
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             Summary: YARN Client Failovers immediately to rm2 but takes ~30000ms to rm3
                 Key: YARN-11355
                 URL: https://issues.apache.org/jira/browse/YARN-11355
             Project: Hadoop YARN
          Issue Type: Bug
          Components: client
    Affects Versions: 3.4.0
            Reporter: Prabhu Joseph
            Assignee: Prabhu Joseph


YARN Client Failovers immediately to rm2 but takes ~30000ms to rm3 during initial retry.

*Repro:*
{code:java}
1. YARN Cluster with three master nodes rm1,rm2 and rm3
2. rm3 is active
3. yarn node -list or any other yarn client calls takes more than 30 seconds.
 {code}
The initial failover to rm2 is immediate but then the failover to rm3 is after ~30000 ms. Current RetryPolicy does not honor the number of master nodes. It has to perform atleast one immediate failover to every rm.
{code:java}
2022-10-20 06:37:44,123 INFO client.ConfiguredRMFailoverProxyProvider: Failing over to rm2
2022-10-20 06:37:44,129 INFO retry.RetryInvocationHandler: java.net.ConnectException: Call From local to remote:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused, while invoking ApplicationClientProtocolPBClientImpl.getClusterNodes over rm2 after 1 failover attempts. Trying to failover after sleeping for 21139ms.
{code}
 

*{*}Workaround:{*}*

Reduce yarn.resourcemanager.connect.retry-interval.ms from 30000 to like 100. This will do immediate failover to rm3 but there will be too many retries when there is no active resourcemanager.
 

 



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