So, to be sure I understand.. the "permission denied" messages are mostly a cosmetic issue? Other than the monitoring page, overall Accumulo functionality is not impacted in any way?
On Tue, Oct 23, 2012 at 10:20 AM, Eric Newton <[email protected]> wrote: > Actually, I run accumulo as myself on a test cluster. The NameNode > monitoring doesn't work, but the monitor can talk to the master just fine. > > The TaskTracker monitoring won't work in Hadoop 2+, so I'm probably going > to remove hadoop monitoring from accumulo 1.5. > > Documenting users and permissions would be a good idea, especially with > regard to bulk imports. > > -Eric > > > On Tue, Oct 23, 2012 at 10:15 AM, Drew Farris <[email protected]> wrote: > >> For what it's worth, I encountered this when trying to set up a system >> where Accumulo is run by a user different than the one used to run >> hdfs. >> >> This will likely become more prevalent as people move towards hadoop >> 1+ where different users are used for hdfs and mapred -- the hadoop >> user becomes a less obvious choice for running Accumulo. >> >> In addition to the Namenode permission denied message, it seems that >> the monitor is unable to connect to the master when the accumulo user >> is not in the Hadoop supergroup (in 1.4.1) >> >> I observed the same error messages David recorded above, but didn't >> see anything that seemed specific to the master issue. >> >> I haven't had the chance to dig much further, has anyone looked in to >> this? Any thoughts on whether it might be possible for things to work >> without having to add the accumulo user to the hdfs supergroup? >> >> Perhaps a discussion of running Accumulo as a particular user could be >> added to the installation manual - I don't think the current manual >> covers anything related to user accounts at all. >> >> Drew >> >> On Thu, Jul 26, 2012 at 6:16 PM, David Medinets >> <[email protected]> wrote: >> > On Mon, Jul 23, 2012 at 8:35 PM, Josh Elser <[email protected]> >> wrote: >> >> Out of curiosity, what is the actual exception/stack-trace printed in >> the >> >> monitor's log? >> > >> > 26 21:43:37,848 [servlets.BasicServlet] DEBUG: >> > org.apache.hadoop.security.AccessControlException: >> > org.apache.hadoop.security.AccessControlException: Permission denied: >> > user=accumulo, access=READ_EXECUTE, >> > inode="system":hadoop:supergroup:rwx-wx-wx >> > org.apache.hadoop.security.AccessControlException: >> > org.apache.hadoop.security.AccessControlException: Permission denied: >> > user=accumulo, access=READ_EXECUTE, >> > inode="system":hadoop:supergroup:rwx-wx-wx >> > at >> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) >> > at >> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) >> > at >> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) >> > at >> java.lang.reflect.Constructor.newInstance(Constructor.java:525) >> > at >> org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:96) >> > at >> org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:58) >> > at >> org.apache.hadoop.hdfs.DFSClient.getContentSummary(DFSClient.java:924) >> > at >> org.apache.hadoop.hdfs.DistributedFileSystem.getContentSummary(DistributedFileSystem.java:232) >> > at >> org.apache.accumulo.server.trace.TraceFileSystem.getContentSummary(TraceFileSystem.java:312) >> > at >> org.apache.accumulo.server.monitor.servlets.DefaultServlet.doAccumuloTable(DefaultServlet.java:312) >> > at >> org.apache.accumulo.server.monitor.servlets.DefaultServlet.pageBody(DefaultServlet.java:243) >> > at >> org.apache.accumulo.server.monitor.servlets.BasicServlet.doGet(BasicServlet.java:61) >> > at >> org.apache.accumulo.server.monitor.servlets.DefaultServlet.doGet(DefaultServlet.java:161) >> > at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) >> > at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) >> > at >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502) >> > at >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363) >> > at >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) >> > at >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) >> > at >> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) >> > at >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) >> > at org.mortbay.jetty.Server.handle(Server.java:324) >> > at >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534) >> > at >> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864) >> > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533) >> > at >> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207) >> > at >> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403) >> > at >> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) >> > at >> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522) >> > >
