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Hudson commented on HDFS-6411: ------------------------------ FAILURE: Integrated in Hadoop-Mapreduce-trunk #1784 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1784/]) HDFS-6411. nfs-hdfs-gateway mount raises I/O error and hangs when a unauthorized user attempts to access it. Contributed by Brandon Li (brandonli: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1597895) * /hadoop/common/trunk/hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/response/ACCESS3Response.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt > nfs-hdfs-gateway mount raises I/O error and hangs when a unauthorized user > attempts to access it > ------------------------------------------------------------------------------------------------ > > Key: HDFS-6411 > URL: https://issues.apache.org/jira/browse/HDFS-6411 > Project: Hadoop HDFS > Issue Type: Bug > Components: nfs > Affects Versions: 2.2.0 > Reporter: Zhongyi Xie > Assignee: Brandon Li > Fix For: 2.4.1 > > Attachments: HDFS-6411-branch-2.2.patch, HDFS-6411.002.patch, > HDFS-6411.003.patch, HDFS-6411.004.patch, HDFS-6411.patch, > tcpdump-HDFS-6411-Brandon.out > > > We use the nfs-hdfs gateway to expose hdfs thru nfs. > 0) login as root, run nfs-hdfs gateway as a user, say, nfsserver. > [root@zhongyi-test-cluster-desktop hdfs]# ls /hdfs > backups hive mr-history system tmp user > 1) add a user nfs-test: adduser nfs-test(make sure that this user is not a > proxyuser of nfsserver > 2) switch to test user: su - nfs-test > 3) access hdfs nfs gateway > [nfs-test@zhongyi-test-cluster-desktop ~]$ ls /hdfs > ls: cannot open directory /hdfs: Input/output error > retry: > [nfs-test@zhongyi-test-cluster-desktop ~]$ ls /hdfs > ls: cannot access /hdfs: Stale NFS file handle > 4) switch back to root and access hdfs nfs gateway > [nfs-test@zhongyi-test-cluster-desktop ~]$ exit > logout > [root@zhongyi-test-cluster-desktop hdfs]# ls /hdfs > ls: cannot access /hdfs: Stale NFS file handle > the nfsserver log indicates we hit an authorization error in the rpc handler; > org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException): > User: nfsserver is not allowed to impersonate nfs-test > and NFS3ERR_IO is returned, which explains why we see input/output error. > One can catch the authorizationexception and return the correct error: > NFS3ERR_ACCES to fix the error message on the client side but that doesn't > seem to solve the mount hang issue though. When the mount hang happens, it > stops printing nfsserver log which makes it more difficult to figure out the > real cause of the hang. According to jstack and debugger, the nfsserver seems > to be waiting for client requests -- This message was sent by Atlassian JIRA (v6.2#6252)