Known Issues in Cloudera Manager 7.11.0

Known issues in Cloudera Manager 7.11.0

OPSAPS-67152: Cloudera Manager does not allow you to update some configuration parameters.

Cloudera Manager does not allow you to set to "0" for the dfs_access_time_precision and dfs_namenode_accesstime_precision configuration parameters.

You will not be able to update dfs_access_time_precision and dfs_namenode_accesstime_precision to "0". If you try to enter "0" in these configuration input fields, then the field gets cleared off and results in a validation error: This field is required.

To fix this issue, perform the workaround steps as mentioned in the KB article.

If you need any guidance during this process, contact Cloudera support.

OPSAPS-68629: HDFS HTTPFS GateWay is not able to start with custom krb5.conf location set in Cloudera Manager.

On a cluster with a custom krb5.conf file location configured in Cloudera Manager, HDFS HTTPFS role is not able to start because it does not have the custom Kerberos configuration file setting properly propagated to the service, and therefore it fails with a Kerberos related exception:

in thread "main"
          java.io.IOException: Unable to initialize WebAppContext at
          org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:1240) at
          org.apache.hadoop.fs.http.server.HttpFSServerWebServer.start(HttpFSServerWebServer.java:131)
          at org.apache.hadoop.fs.http.server.HttpFSServerWebServer.main(HttpFSServerWebServer.java:162)
          Caused by: java.lang.IllegalArgumentException: Can't get Kerberos realm at
          org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:71) at
          org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:329) at
          org.apache.hadoop.security.UserGroupInformation.setConfiguration(UserGroupInformation.java:380)
          at
          org.apache.hadoop.lib.service.hadoop.FileSystemAccessService.init(FileSystemAccessService.java:166)
          at org.apache.hadoop.lib.server.BaseService.init(BaseService.java:71) at
          org.apache.hadoop.lib.server.Server.initServices(Server.java:581) at
          org.apache.hadoop.lib.server.Server.init(Server.java:377) at
          org.apache.hadoop.fs.http.server.HttpFSServerWebApp.init(HttpFSServerWebApp.java:100) at
          org.apache.hadoop.lib.servlet.ServerWebApp.contextInitialized(ServerWebApp.java:158) at
          org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:1073)
          at
          org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:572)
          at
          org.eclipse.jetty.server.handler.ContextHandler.contextInitialized(ContextHandler.java:1002)
          at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:765) at
          org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:379)
          at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1449) at
          org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1414) at
          org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:916) at
          org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288) at
          org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524) at
          org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) at
          org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) at
          org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117) at
          org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) at
          org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) at
          org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) at
          org.eclipse.jetty.server.Server.start(Server.java:423) at
          org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110) at
          org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97) at
          org.eclipse.jetty.server.Server.doStart(Server.java:387) at
          org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) at
          org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:1218) ... 2 more Caused by:
          java.lang.IllegalArgumentException: KrbException: Cannot locate default realm at
          java.security.jgss/javax.security.auth.kerberos.KerberosPrincipal.<init>(KerberosPrincipal.java:174)
          at
          org.apache.hadoop.security.authentication.util.KerberosUtil.getDefaultRealm(KerberosUtil.java:108)
          at org.apache.hadoop.security.HadoopKerberosName.setConfiguration(HadoopKerberosName.java:69)
          ...

Log in to Cloudera Manager.
Select the HDFS service.
Select Configurations tab.
Search for HttpFS Environment Advanced Configuration Snippet (Safety Valve)
Add to or extend the HADOOP_OPTS environment variable with the following value: -Djava.security.krb5.conf=<the custom krb5.conf location>
Click Save Changes.