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https://issues.apache.org/jira/browse/HIVE-21249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16767903#comment-16767903
]
Sankar Hariappan commented on HIVE-21249:
-----------------------------------------
[~daijy], I've few comments.
1. In ObjectStore.listTableColumnGrants
- Need to normalizeIdentifier(columnName) before use.
- Can we change the if-else logic as follows to minimize the number of
comparisons to 2 in any flow.
{code}
if (columnName == null) {
if (authorizer == null {
} else {
}
} else {
if (authorizer == null {
} else {
}
}
{code}
2. Shall remove the unused ObjectStore.listTableAllColumnGrants method.
3. In PrivilegeSynchronizer.run, can we make smaller batch of columns instead
of invoking refresh_privileges for each column? This would avoid too many HMS
api calls.
> Reduce memory footprint in ObjectStore.refreshPrivileges
> ---------------------------------------------------------
>
> Key: HIVE-21249
> URL: https://issues.apache.org/jira/browse/HIVE-21249
> Project: Hive
> Issue Type: Bug
> Components: Standalone Metastore
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Priority: Major
> Attachments: HIVE-21249.1.patch
>
>
> We found there're could be many records in TBL_COL_PRIVS for a single table
> (a table granted to many users), thus result a OOM in
> ObjectStore.listTableAllColumnGrants. We shall reduce the memory footprint
> for ObjectStore.refreshPrivileges. Here is the stack of OOM:
> {code}
> org.datanucleus.api.jdo.JDOPersistenceManager.retrieveAll(JDOPersistenceManager.java:690)
> org.datanucleus.api.jdo.JDOPersistenceManager.retrieveAll(JDOPersistenceManager.java:710)
> org.apache.hadoop.hive.metastore.ObjectStore.listTableAllColumnGrants(ObjectStore.java:6629)
> org.apache.hadoop.hive.metastore.ObjectStore.refreshPrivileges(ObjectStore.java:6200)
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native method)
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> java.lang.reflect.Method.invoke(Method.java:498)
> org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:97)
> com.sun.proxy.$Proxy32.refreshPrivileges(, line not available)
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.refresh_privileges(HiveMetaStore.java:6507)
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native method)
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> java.lang.reflect.Method.invoke(Method.java:498)
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:147)
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:108)
> com.sun.proxy.$Proxy34.refresh_privileges(, line not available)
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$refresh_privileges.getResult(ThriftHiveMetastore.java:17608)
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$refresh_privileges.getResult(ThriftHiveMetastore.java:17592)
> org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor$1.run(HadoopThriftAuthBridge.java:636)
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor$1.run(HadoopThriftAuthBridge.java:631)
> java.security.AccessController.doPrivileged(Native method)
> javax.security.auth.Subject.doAs(Subject.java:422)
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1688)
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor.process(HadoopThriftAuthBridge.java:631)
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> java.lang.Thread.run(Thread.java:748)
> {code}
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