Doug, thanks. Would what I proposed be reasonable short term? Olga
> -----Original Message----- > From: Doug Cutting [mailto:[EMAIL PROTECTED] > Sent: Monday, March 24, 2008 5:40 PM > To: core-dev@hadoop.apache.org > Subject: Re: How can I tell that I have "permission denied" > error returned to me > > This is a shortcoming of Hadoop RPC. Ideally exceptions > thrown on the server would be re-thrown on the client, but > the concern is that their class might not exist there, so we > instead transmit the just class name and the error string and > do not attempt to re-throw the original exception and instead > throw a RemoteException. HDFS could patch around this, but > it would really be best to fix it in the RPC layer. > > Doug > > Olga Natkovich wrote: > > Hi, > > > > In my code, I want to be able to differentiate access > control problems > > and give a meaningful message to the users. I noticed that > in this case > > org.apache.hadoop.fs.permission.AccessControlException is thrown but > > then it gets wrapped into other exceptions such as > java.io.IOException > > or org.apache.hadoop.ipc.RemoteException. > > > > One way to figure it out is to recursively check for the > cause of the > > exception to be of type > > org.apache.hadoop.fs.permission.AccessControlException. Is this the > > right/best way to go about it? > > > > Thanks, > > > > Olga > > > >
