Stephen Chu created HDFS-5471:
---------------------------------
Summary: CacheAdmin -listPools fails when pools exist that user
does not have permissions to
Key: HDFS-5471
URL: https://issues.apache.org/jira/browse/HDFS-5471
Project: Hadoop HDFS
Issue Type: Bug
Components: tools
Affects Versions: 3.0.0
Reporter: Stephen Chu
When a user does not have read permissions to a cache pool and executes "hdfs
cacheadmin -listPools" the command will error complaining about missing
required fields with something like:
{code}
[schu@hdfs-nfs ~]$ hdfs cacheadmin -listPools
Exception in thread "main"
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.RemoteException):
Message missing required fields: ownerName, groupName, mode, weight
at
com.google.protobuf.AbstractMessage$Builder.newUninitializedMessageException(AbstractMessage.java:770)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ListCachePoolsResponseElementProto$Builder.build(ClientNamenodeProtocolProtos.java:51722)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.listCachePools(ClientNamenodeProtocolServerSideTranslatorPB.java:1200)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:605)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:932)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2057)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2053)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1515)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2051)
at
org.apache.hadoop.hdfs.tools.CacheAdmin$ListCachePoolsCommand.run(CacheAdmin.java:675)
at org.apache.hadoop.hdfs.tools.CacheAdmin.run(CacheAdmin.java:85)
at org.apache.hadoop.hdfs.tools.CacheAdmin.main(CacheAdmin.java:90)
[schu@hdfs-nfs ~]$
{code}
In this example, the pool "root" has 750 permissions, and the root superuser is
able to successfully -listPools:
{code}
[root@hdfs-nfs ~]# hdfs cacheadmin -listPools
Found 4 results.
NAME OWNER GROUP MODE WEIGHT
bar root root rwxr-xr-x 100
foo root root rwxr-xr-x 100
root root root rwxr-x--- 100
schu root root rwxr-xr-x 100
[root@hdfs-nfs ~]#
{code}
When we modify the root pool to mode 755, schu user can now -listPools
successfully without error.
{code}
[schu@hdfs-nfs ~]$ hdfs cacheadmin -listPools
Found 4 results.
NAME OWNER GROUP MODE WEIGHT
bar root root rwxr-xr-x 100
foo root root rwxr-xr-x 100
root root root rwxr-xr-x 100
schu root root rwxr-xr-x 100
[schu@hdfs-nfs ~]$
{code}
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