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https://issues.apache.org/jira/browse/HDFS-14583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16909700#comment-16909700
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xuzq commented on HDFS-14583:
-----------------------------
Thanks [~jojochuang].
The HdfsFileStatus of mount point has an empty symlink in RBF, the code is:
{code:java}
//
org.apache.hadoop.hdfs.server.federation.router.RouterClientProtocol#getMountPointStatus
return new HdfsFileStatus.Builder()
.isdir(true)
.mtime(modTime)
.atime(accessTime)
.perm(permission)
.owner(owner)
.group(group)
.symlink(new byte[0])
.path(DFSUtil.string2Bytes(name))
.fileId(inodeId)
.children(childrenNum)
.build();
{code}
> FileStatus#toString() will throw IllegalArgumentException
> ---------------------------------------------------------
>
> Key: HDFS-14583
> URL: https://issues.apache.org/jira/browse/HDFS-14583
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: xuzq
> Assignee: xuzq
> Priority: Major
> Labels: HDFS
> Attachments: HDFS-14583-trunk-0001.patch
>
>
> FileStatus#toString() will throw IllegalArgumentException, stack and error
> message like this:
> {code:java}
> java.lang.IllegalArgumentException: Can not create a Path from an empty string
> at org.apache.hadoop.fs.Path.checkPathArg(Path.java:172)
> at org.apache.hadoop.fs.Path.<init>(Path.java:184)
> at
> org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus.getSymlink(HdfsLocatedFileStatus.java:117)
> at org.apache.hadoop.fs.FileStatus.toString(FileStatus.java:462)
> at
> org.apache.hadoop.hdfs.web.TestJsonUtil.testHdfsFileStatus(TestJsonUtil.java:123)
> {code}
> Test Code like this:
> {code:java}
> @Test
> public void testHdfsFileStatus() throws IOException {
> HdfsFileStatus hdfsFileStatus = new HdfsFileStatus.Builder()
> .replication(1)
> .blocksize(1024)
> .perm(new FsPermission((short) 777))
> .owner("owner")
> .group("group")
> .symlink(new byte[0])
> .path(new byte[0])
> .fileId(1010)
> .isdir(true)
> .build();
> System.out.println("HdfsFileStatus = " + hdfsFileStatus.toString());
> }{code}
>
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