LiuGuH opened a new pull request, #7514:
URL: https://github.com/apache/hadoop/pull/7514
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### Description of PR
As discription in
[HDFS-17760](https://issues.apache.org/jira/browse/HDFS-17760)
Move a dir to trash , when the trash alreay has a file inode with the same
name in dir, it will throw ParentNotDirectoryException.
This can be reproduced by following the steps below：
User test does this:
1. hdfs dfs -touch /subdir0
2. hdfs dfs -rmr /subdir0
The trash path will be /user/test/.Trash/Current/subdir0
3. hdfs dfs -mkdir -p /subdir0/subdir1/subdir2
4. hdfs dfs -rmr /subdir0/subdir1/subdir2
The trash path should be
/user/test/.Trash/Current/subdir0timestamp/subdir1/subdir2 ,rather than thow
ParentNotDirectoryException
Detailed stack of errors reported：
```
Caused by:
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.fs.ParentNotDirectoryException):
/user/test/Current/subdir0 (is not a directory)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkIsDirectory(FSPermissionChecker.java:905)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:578)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:490)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermissionWithContext(FSPermissionChecker.java:527)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:397)
at
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:873)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkTraverse(FSDirectory.java:1907)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkTraverse(FSDirectory.java:1925)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.resolvePath(FSDirectory.java:740)
at
org.apache.hadoop.hdfs.server.namenode.FSDirMkdirOp.mkdirs(FSDirMkdirOp.java:53)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:3568)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:1176)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:742)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:631)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:599)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:583)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1228)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1294)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1216)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1959)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:3250)
at org.apache.hadoop.ipc.Client.warpIOException(Client.java:1596)
at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1587)
at org.apache.hadoop.ipc.Client.call(Client.java:1540)
at org.apache.hadoop.ipc.Client.call(Client.java:1458)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:259)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:140)
at com.sun.proxy.$Proxy79.mkdirs(Unknown Source)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.lambda$mkdirs$20(ClientNamenodeProtocolTranslatorPB.java:611)
at
org.apache.hadoop.ipc.internal.ShadedProtobufHelper.ipc(ShadedProtobufHelper.java:160)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.mkdirs(ClientNamenodeProtocolTranslatorPB.java:611)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:437)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:170)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:162)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:100)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:366)
at com.sun.proxy.$Proxy80.mkdirs(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient.primitiveMkdir(DFSClient.java:2555)
at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:2531)
at
org.apache.hadoop.hdfs.DistributedFileSystem$27.doCall(DistributedFileSystem.java:1507)
at
org.apache.hadoop.hdfs.DistributedFileSystem$27.doCall(DistributedFileSystem.java:1504)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.mkdirsInternal(DistributedFileSystem.java:1521)
at
org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:1496)
```
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