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From "Arpit Khare (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-14062) WebHDFS: Uploading a file again with the same naming convention
Date Fri, 09 Nov 2018 20:54:00 GMT
Arpit Khare created HDFS-14062:
----------------------------------

             Summary: WebHDFS: Uploading a file again with the same naming convention
                 Key: HDFS-14062
                 URL: https://issues.apache.org/jira/browse/HDFS-14062
             Project: Hadoop HDFS
          Issue Type: New Feature
          Components: webhdfs
    Affects Versions: 3.1.1
            Reporter: Arpit Khare


*PROBLEM STATEMENT:*

If we want to re-upload a file with the same name, to HDFS using WebHDFS APIs, WebHDFS APIs
does not allow, giving error:

{code}"exception":"FileAlreadyExistsException","javaClassName":"org.apache.hadoop.fs.FileAlreadyExistsException"\{code}

But from HDFS command we can force upload(overwrite) a file having same name:

hdfs dfs -put -f /tmp/file1.txt /user/ambari-test

 

Can we enable this feature via WebHDFS APIs also?

 

*STEPS TO REPRODUCE:*

1. Create a directory in HDFS using WebHDFS API:

# curl -iL -X PUT "http://<NAMENODE_IP>:<PORT>/webhdfs/v1/user/admin/Test?op=MKDIRS&user.name=admin"

2. Upload a file called /tmp/file1.txt:
# curl -iL -X PUT -T "/tmp/file1.txt" "http://<NAMENODE_IP>:<PORT>/webhdfs/v1/user/admin/Test/file1.txt?op=CREATE&user.name=admin"

3. Now edit this file and then try uploading it back:
# curl -iL -X PUT -T "/tmp/file1.txt" "http://<NAMENODE_IP>:<PORT>/webhdfs/v1/user/admin/Test/file1.txt?op=CREATE&user.name=admin"

4. We get the following error:

HTTP/1.1 100 Continue

HTTP/1.1 403 Forbidden
Content-Type: application/json; charset=utf-8
Content-Length: 1465
Connection: close

{"RemoteException":\{"exception":"FileAlreadyExistsException","javaClassName":"org.apache.hadoop.fs.FileAlreadyExistsException","message":"/user/admin/Test/file1.txt
for client 172.26.123.95 already exists\n\tat org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:2815)\n\tat
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInt(FSNamesystem.java:2702)\n\tat
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:2586)\n\tat
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.create(NameNodeRpcServer.java:736)\n\tat
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.create(ClientNamenodeProtocolServerSideTranslatorPB.java:409)\n\tat
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)\n\tat
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:640)\n\tat
org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)\n\tat org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2351)\n\tat
org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2347)\n\tat java.security.AccessController.doPrivileged(Native
Method)\n\tat javax.security.auth.Subject.doAs(Subject.java:422)\n\tat org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1869)\n\tat
org.apache.hadoop.ipc.Server$Handler.run(Server.java:2347)\n"}}

 



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