Siyao Meng created HDFS-14242:
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Summary: OIV WebImageViewer: NPE when param op is not specified
Key: HDFS-14242
URL: https://issues.apache.org/jira/browse/HDFS-14242
Project: Hadoop HDFS
Issue Type: Bug
Components: tools
Affects Versions: 3.1.1
Reporter: Siyao Meng
Assignee: Siyao Meng
{code:bash|title=Repro. Tab 1: Start WebImageViewer}
$ hdfs oiv -i fsimage_0000000000011467437
2019-01-28 23:30:20,536 INFO offlineImageViewer.FSImageHandler: Loading 6
strings
2019-01-28 23:30:20,545 INFO offlineImageViewer.FSImageHandler: Loading 2031774
inodes.
2019-01-28 23:30:22,602 INFO offlineImageViewer.FSImageHandler: Loading inode
references
2019-01-28 23:30:22,610 INFO offlineImageViewer.FSImageHandler: Loaded 0 inode
references
2019-01-28 23:30:22,610 INFO offlineImageViewer.FSImageHandler: Loading inode
directory section
2019-01-28 23:30:22,739 INFO offlineImageViewer.FSImageHandler: Loaded 31758
directories
2019-01-28 23:30:22,800 INFO offlineImageViewer.WebImageViewer: WebImageViewer
started. Listening on /127.0.0.1:5978. Press Ctrl+C to stop the viewer.
{code}
{code:bash|title=Repro. Tab 2: curl /webhdfs/v1 without params}
# NPE without op (null/empty op)
$ curl http://127.0.0.1:5978/webhdfs/v1/
{"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException","message":null}}
# Okay with op
$ curl http://127.0.0.1:5978/webhdfs/v1/\?op\=LISTSTATUS
{"FileStatuses":{"FileStatus":[
{"owner":"hdfs","replication":0,"pathSuffix":"tmp","modificationTime":1534356863827,"childrenNum":3,"length":0,"permission":"1777","type":"DIRECTORY","blockSize":0,"accessTime":0,"group":"supergroup","fileId":16388},{"owner":"hdfs","replication":0,"pathSuffix":"user","modificationTime":1534273588466,"childrenNum":3,"length":0,"permission":"755","type":"DIRECTORY","blockSize":0,"accessTime":0,"group":"supergroup","fileId":16386}
]}}
{code}
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