最近集群运行日志发现，有个任务运行出现下面的报错信息：
org.apache.hadoop.io.SecureIOUtils$AlreadyExistsException: EEXIST: File exists
at org.apache.hadoop.io.SecureIOUtils.createForWrite(SecureIOUtils.java:167)
at org.apache.hadoop.mapred.TaskLog.writeToIndexFile(TaskLog.java:312)
at org.apache.hadoop.mapred.TaskLog.syncLogs(TaskLog.java:385)
at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: EEXIST: File exists
at org.apache.hadoop.io.nativeio.NativeIO.open(Native Method)
at org.apache.hadoop.io.SecureIOUtils.createForWrite(SecureIOUtils.java:161)
at org.apache.hadoop.mapred.TaskLog.writeToIndexFile(TaskLog.java:312)
at org.apache.hadoop.mapred.TaskLog.syncLogs(TaskLog.java:385)
at org.apache.hadoop.mapred.Child$4.run(Child.java:257)
... 3 more