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From "Vani (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11315) Not able to access the snapshot folder using NFS gateway
Date Wed, 11 Jan 2017 09:36:58 GMT
Vani created HDFS-11315:
---------------------------

             Summary: Not able to access the snapshot folder using NFS gateway
                 Key: HDFS-11315
                 URL: https://issues.apache.org/jira/browse/HDFS-11315
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs, nfs
    Affects Versions: 2.7.1
            Reporter: Vani
            Priority: Trivial


After mounting HDFS filesystem using NFS gateway, we are not able to see .snapshot folder.
We get the below error message while accessing the snapshot folder. 
ls: cannot access /xxxx/.snapshot: Input/output error .
The error message seen in the nfs gateway log:-
WARN nfs3.RpcProgramNfs3 (RpcProgramNfs3.java:getattr(344)) - Exception 
org.apache.hadoop.ipc.RemoteException(java.io.FileNotFoundException): File for given inode
path does not exist: /.reserved/.inodes/-1
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.resolveDotInodesPath(FSDirectory.java:1642)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.resolvePath(FSDirectory.java:1610)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.resolvePath(FSDirectory.java:640)
at org.apache.hadoop.hdfs.server.namenode.FSDirStatAndListingOp.getFileInfo(FSDirStatAndListingOp.java:104)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:3972)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getFileLinkInfo(NameNodeRpcServer.java:1143)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileLinkInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:867)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:640)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2313)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2309)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1724)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2307)
at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1552)
at org.apache.hadoop.ipc.Client.call(Client.java:1496)
at org.apache.hadoop.ipc.Client.call(Client.java:1396)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:233)
at com.sun.proxy.$Proxy12.getFileLinkInfo(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileLinkInfo(ClientNamenodeProtocolTranslatorPB.java:829)
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:278)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:194)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:176)
at com.sun.proxy.$Proxy13.getFileLinkInfo(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient.getFileLinkInfo(DFSClient.java:2198)
at org.apache.hadoop.hdfs.nfs.nfs3.Nfs3Utils.getFileStatus(Nfs3Utils.java:58)
at org.apache.hadoop.hdfs.nfs.nfs3.Nfs3Utils.getFileAttr(Nfs3Utils.java:82)
at org.apache.hadoop.hdfs.nfs.nfs3.WriteManager.getFileAttr(WriteManager.java:325)
at org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3.getattr(RpcProgramNfs3.java:342)
at org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3.getattr(RpcProgramNfs3.java:306)
at org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3.handleInternal(RpcProgramNfs3.java:2188)
at org.apache.hadoop.oncrpc.RpcProgram.messageReceived(RpcProgram.java:167)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:281)
at org.apache.hadoop.oncrpc.RpcUtil$RpcMessageParserStage.messageReceived(RpcUtil.java:132)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:555)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:107)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:88)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)



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