question Re: HDFS NFS copy commands fails with cannot create regular file Input/output error in Archives of Support Questions (Read Only)

HDFS NFS copy commands fails with cannot create regular file Input/output error

rgautam — Thu, 09 Feb 2017 07:53:17 GMT

cp /tmp/Data_src/1MB_File /tmp/tmp_mnt/NFS_DIR/1MB_File

cp: cannot create regular file ‘/tmp/tmp_mnt/NFS_DIR/1MB_File’: Input/output error

Re: HDFS NFS copy commands fails with cannot create regular file Input/output error

namaheshwari — Thu, 09 Feb 2017 07:54:20 GMT

@Raghav Kumar Gautam- Can you please share HDFS NFS server logs?

Re: HDFS NFS copy commands fails with cannot create regular file Input/output error

rgautam — Thu, 09 Feb 2017 07:57:47 GMT

From the HDFS NFS logs I see the below exception

org.apache.hadoop.ipc.RemoteException(java.io.IOException): Access time for hdfs is not configured.  Please set dfs.namenode.accesstime.precision configuration parameter.
        at org.apache.hadoop.hdfs.server.namenode.FSDirAttrOp.setTimes(FSDirAttrOp.java:105)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setTimes(FSNamesystem.java:1953)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.setTimes(NameNodeRpcServer.java:1360)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.setTimes(ClientNamenodeProtocolServerSideTranslatorPB.java:926)
        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$1.run(Server.java:2351)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2347)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1833)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2345)
        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.setTimes(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.setTimes(ClientNamenodeProtocolTranslatorPB.java:901)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

I have set the dfs.access.time.precision value to 360000 in hdfs-site.xml. Please let me know what am I missing here

Re: HDFS NFS copy commands fails with cannot create regular file Input/output error

namaheshwari — Thu, 09 Feb 2017 08:00:29 GMT

@Raghav Kumar Gautam

As from the logs you can see you need to set the dfs.namenode.accesstime.precision value to 3600000. The property dfs.access.time.precision is deprecated. Ambari sets the new one dfs.namenode.accesstime.precision to 0, which disables setting access time. So, setting the new property should resolve the issue.

Re: HDFS NFS copy commands fails with cannot create regular file Input/output error

pmalla — Wed, 21 Jun 2017 21:09:24 GMT

Hi Raghav, I am also facing same issue.. is it resolved for you?

Re: HDFS NFS copy commands fails with cannot create regular file Input/output error

Shyam_siam — Tue, 05 Sep 2023 07:53:58 GMT

In CDP 7.1.8 you cant set access time parameter

dfs.access.time.precision to zero, it doesnt accept this value while updating the configuration.