Hector Sandoval Chaverri created HADOOP-18222:
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Summary: 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
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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