[ https://issues.apache.org/jira/browse/HDFS-11395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nandakumar updated HDFS-11395: ------------------------------ Description: When using RequestHedgingProxyProvider, in case of Exception (like FileNotFoundException) from ActiveNameNode, {{RequestHedgingProxyProvider#RequestHedgingInvocationHandler.invoke}} receives {{ExecutionException}} since we use {{CompletionService}} for the call. The ExecutionException is put into a map and wrapped with {{MultiException}}. So for a FileNotFoundException the client receives {{MultiException(Map(ExecutionException(InvocationTargetException(RemoteException(FileNotFoundException)))))}} It will cause problem in clients which are handling RemoteExceptions. was: When using RequestHedgingProxyProvider, in case of Exception (like FileNotFoundException) from ActiveNameNode, {{RequestHedgingProxyProvider#RequestHedgingInvocationHandler.invoke}} receives {{ExecutionException}} since we use {{CompletionService}} for the call. The ExecutionException is put into a map and wrapped with {{MultiException}}. So for a FileNotFoundException the client receives {{MultiException(Map(ExecutionException(InvocationTargetException(RemoteException(FileNotFoundException)))))}} It will cause problem in clients which are handling the RemoteExceptions. > RequestHedgingProxyProvider#RequestHedgingInvocationHandler hides the > Exception thrown from NameNode > ---------------------------------------------------------------------------------------------------- > > Key: HDFS-11395 > URL: https://issues.apache.org/jira/browse/HDFS-11395 > Project: Hadoop HDFS > Issue Type: Bug > Components: ha > Reporter: Nandakumar > Assignee: Nandakumar > > When using RequestHedgingProxyProvider, in case of Exception (like > FileNotFoundException) from ActiveNameNode, > {{RequestHedgingProxyProvider#RequestHedgingInvocationHandler.invoke}} > receives {{ExecutionException}} since we use {{CompletionService}} for the > call. The ExecutionException is put into a map and wrapped with > {{MultiException}}. > So for a FileNotFoundException the client receives > {{MultiException(Map(ExecutionException(InvocationTargetException(RemoteException(FileNotFoundException)))))}} > It will cause problem in clients which are handling RemoteExceptions. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org