我有一个应用程序,应该将大量文件从S3等源复制到HDFS.该应用程序使用apache distcp并通过流式传输将每个单独的文件从流复制到HDFS.
每个单独的文件约为1GB,有1K列的字符串.当我选择复制所有列时,写入失败并出现以下错误: -
2014-05-20 23:57:35,939 WARN org.apache.hadoop.hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null
2014-05-20 23:57:35,939 WARN org.apache.hadoop.hdfs.DFSClient: Could not get block locations. Source file "/xyz/2014/01/02/control-Jan-2014-14.gz" - Aborting...
2014-05-20 23:57:54,369 ERROR abc.mapred.distcp.DistcpRunnable: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /xyz/2014/01/02/control-Jan-2014-14.gz File does not exist. [Lease. Holder: DFSClient_attempt_201403272055_15994_m_000004_0_-1476619343_1, pendingcreates: 4]
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1720)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1711)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1619)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:736)
at sun.reflect.GeneratedMethodAccessor41.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
at …