[jira] [Created] (HADOOP-17681) Received "Permission denied" error while copying files through NFS Gateway

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[jira] [Created] (HADOOP-17681) Received "Permission denied" error while copying files through NFS Gateway

ASF GitHub Bot (Jira)
David created HADOOP-17681:
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             Summary: Received "Permission denied" error while copying files through NFS Gateway
                 Key: HADOOP-17681
                 URL: https://issues.apache.org/jira/browse/HADOOP-17681
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: David


In this case, while the file was copying through NFS gateway, the below permission error reports.
2021-03-29 05:19:13,389 INFO org.apache.hadoop.security.ShellBasedIdMapping: Update cache now
2021-03-29 05:19:13,399 WARN org.apache.hadoop.security.ShellBasedIdMapping: Can't find user name for uid 5999. Use default user name nobody
2021-03-29 05:19:13,412 INFO org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3: Error writing to fileId 10131842296 at offset 3254190080 and length 32768
org.apache.hadoop.security.AccessControlException: Permission denied: user=nobody, access=EXECUTE, inode="/xxx":test:test:drwxrwx---

There is a map file exist, but never got changed.

Between Update Cache and Clear, some race conditions cause the unavailability of the user/group mapping from cache?



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