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https://issues.apache.org/jira/browse/HADOOP-18222?focusedWorklogId=767719&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-767719
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ASF GitHub Bot logged work on HADOOP-18222:
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Author: ASF GitHub Bot
Created on: 08/May/22 20:57
Start Date: 08/May/22 20:57
Worklog Time Spent: 10m
Work Description: szilard-nemeth commented on PR #4266:
URL: https://github.com/apache/hadoop/pull/4266#issuecomment-1120485892
Hi @hchaverri ,
CC: @slfan1989
If this still causes test failures I'd also vote for reverting HADOOP-18167
first.
For example, I can't merge my changes in YARN-11114 as I don't have
confidence if my changes have broken the RMWebServices tests or they are still
caused by the double metrics registration issue originally caused by
HADOOP-18167.
This is the main reason I reported YARN-11123.
Issue Time Tracking
-------------------
Worklog Id: (was: 767719)
Time Spent: 1h (was: 50m)
> Prevent DelegationTokenSecretManagerMetrics from registering multiple times
> ----------------------------------------------------------------------------
>
> Key: HADOOP-18222
> URL: https://issues.apache.org/jira/browse/HADOOP-18222
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Hector Sandoval Chaverri
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> After committing HADOOP-18167, we received reports of the following error
> when ResourceManager is initialized:
> {noformat}
> Caused by: java.io.IOException: Problem starting http server
> at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:1389)
> at
> org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:475)
> ... 4 more
> Caused by: org.apache.hadoop.metrics2.MetricsException: Metrics source
> DelegationTokenSecretManagerMetrics already exists!
> at
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:152)
> at
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:125)
> at
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:229)
> at
> org.apache.hadoop.metrics2.MetricsSystem.register(MetricsSystem.java:71)
> at
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager$DelegationTokenSecretManagerMetrics.create(AbstractDelegationTokenSecretManager.java:878)
> at
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager.<init>(AbstractDelegationTokenSecretManager.java:152)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenManager$DelegationTokenSecretManager.<init>(DelegationTokenManager.java:72)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenManager.<init>(DelegationTokenManager.java:122)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationHandler.initTokenManager(DelegationTokenAuthenticationHandler.java:161)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationHandler.init(DelegationTokenAuthenticationHandler.java:130)
> at
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.initializeAuthHandler(AuthenticationFilter.java:194)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.initializeAuthHandler(DelegationTokenAuthenticationFilter.java:214)
> at
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.init(AuthenticationFilter.java:180)
> at
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.init(DelegationTokenAuthenticationFilter.java:180)
> at
> org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter.init(RMAuthenticationFilter.java:53){noformat}
> This can happen if MetricsSystemImpl#init is called and multiple metrics are
> registered with the same name. A proposed solution is to declare the metrics
> in AbstractDelegationTokenSecretManager as singleton, which would prevent
> multiple instances DelegationTokenSecretManagerMetrics from being registered.
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