[jira] [Created] (ACCUMULO-1282) Monitor requires jumping through hadoop permissions hoops (and granting accumulo broad permissions)

["Michael Berman (JIRA)" <ji...@apache.org>]

Michael Berman created ACCUMULO-1282:
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             Summary: Monitor requires jumping through hadoop permissions hoops (and granting accumulo broad permissions)
                 Key: ACCUMULO-1282
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1282
             Project: Accumulo
          Issue Type: Bug
    Affects Versions: 1.5.0
            Reporter: Michael Berman
            Priority: Minor


The monitor's master status box requires getContentSummary(new Path("/")) on HDFS (otherwise see stack trace below).  There doesn't seem to be any way to grant this permission to a particular user or change the permissions on /, so for this to work, you either need to run accumulo and hdfs as the same user or add accumulo's user to hadoop's supergroup.  Either way, this seems like it's granting unnecessarily broad permissions to accumulo.  Is there some other way to get the disk usage information out of hadoop with normal user-level permissions?

{code}
2013-04-16 20:34:57,770 [servlets.BasicServlet] DEBUG:  org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=accumulo, ac
cess=READ_EXECUTE, inode="system":hadoop:supergroup:rwx------
org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=accumulo, access=READ_EXECUTE, inode="system":hadoop:supergroup:rwx-
-----
        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:532)
        at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:95)
        at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)
        at org.apache.hadoop.hdfs.DFSClient.getContentSummary(DFSClient.java:1438)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getContentSummary(DistributedFileSystem.java:251)
        at org.apache.accumulo.server.trace.TraceFileSystem.getContentSummary(TraceFileSystem.java:312)
        at org.apache.accumulo.server.monitor.servlets.DefaultServlet.doAccumuloTable(DefaultServlet.java:317)
        at org.apache.accumulo.server.monitor.servlets.DefaultServlet.pageBody(DefaultServlet.java:256)
        at org.apache.accumulo.server.monitor.servlets.BasicServlet.doGet(BasicServlet.java:61)
        at org.apache.accumulo.server.monitor.servlets.DefaultServlet.doGet(DefaultServlet.java:157)
        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:511)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
        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:326)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.security.AccessControlException: Permission denied: user=accumulo, access=READ_EXECUTE, inode="system":hadoop:supergroup:rwx--
----
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:199)
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkSubAccess(FSPermissionChecker.java:168)
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:137)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5468)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getContentSummary(FSNamesystem.java:2225)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.getContentSummary(NameNode.java:986)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:416)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

        at org.apache.hadoop.ipc.Client.call(Client.java:1107)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
        at sun.proxy.$Proxy1.getContentSummary(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)
        at sun.proxy.$Proxy1.getContentSummary(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.getContentSummary(DFSClient.java:1436)
        ... 22 more
{code}

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