Caused by: java.io.IOException: Filesystem closed的处理

org.apache.hadoop.hive.ql.metadata.HiveException: Unable to rename output from: hdfs://nameservice/user/hive/warehouse/om_dw.db/mac_wifi_day_data/tid=CYJOY/.hive-staging_hive_2016-01-20_10-19-09_200_1283758166994658237-1/_task_tmp.-ext-10002/c_date=2014-10-06/_tmp.000151_0 to: hdfs://nameservice/user/hive/warehouse/om_dw.db/mac_wifi_day_data/tid=CYJOY/.hive-staging_hive_2016-01-20_10-19-09_200_1283758166994658237-1/_tmp.-ext-10002/c_date=2014-10-06/000151_0
at org.apache.hadoop.hive.ql.exec.FileSinkOperator$FSPaths.commit(FileSinkOperator.java:242)
at org.apache.hadoop.hive.ql.exec.FileSinkOperator$FSPaths.access$200(FileSinkOperator.java:143)
at org.apache.hadoop.hive.ql.exec.FileSinkOperator.closeOp(FileSinkOperator.java:1051)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:617)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:631)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:631)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:631)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:192)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:61)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
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:1657)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: java.io.IOException: Filesystem closed
at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:808)
at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2113)
at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1305)
at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1301)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1301)
at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1424)
at org.apache.hadoop.hive.ql.exec.FileSinkOperator$FSPaths.commit(FileSinkOperator.java:218)
... 15 more

原因:

多个datanode在getFileSystem过程中，由于Configuration一样，会得到同一个FileSystem。如果有一个datanode在使用完关闭连接，其它的datanode在访问就会出现上述异常

解决办法：

在hdfs core-site.xml里把fs.hdfs.impl.disable.cache设置为true