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Posted to common-issues@hadoop.apache.org by "Hongyuan Li (JIRA)" <ji...@apache.org> on 2017/06/10 04:13:18 UTC
[jira] [Commented] (HADOOP-14469) FTPFileSystem#listStatus get
currentPath and parentPath, which will cause recursively list stuck
[ https://issues.apache.org/jira/browse/HADOOP-14469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16045372#comment-16045372 ]
Hongyuan Li commented on HADOOP-14469:
--------------------------------------
[~stevel@apache.org] added test code and environment.
> FTPFileSystem#listStatus get currentPath and parentPath, which will cause recursively list stuck
> ------------------------------------------------------------------------------------------------
>
> Key: HADOOP-14469
> URL: https://issues.apache.org/jira/browse/HADOOP-14469
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 3.0.0-alpha3
> Environment: ftp build by windows7 + Serv-U_6412.1.0.8
> code runs any os
> Reporter: Hongyuan Li
> Assignee: Hongyuan Li
> Attachments: HADOOP-14469-001.patch, HADOOP-14469-002.patch, HADOOP-14469-003.patch
>
>
> for some ftpsystems, liststatus method will return new Path(".") and new Path(".."), thus causing list op looping.for example, Serv-U
> We can see the logic in code below:
> {code}
> private FileStatus[] listStatus(FTPClient client, Path file)
> throws IOException {
> ……
> FileStatus[] fileStats = new FileStatus[ftpFiles.length];
> for (int i = 0; i < ftpFiles.length; i++) {
> fileStats[i] = getFileStatus(ftpFiles[i], absolute);
> }
> return fileStats;
> }
> {code}
> {code}
> public void test() throws Exception{
> FTPFileSystem ftpFileSystem = new FTPFileSystem();
> ftpFileSystem.initialize(new Path("ftp://test:123456@192.168.44.1/").toUri(),
> new Configuration());
> FileStatus[] fileStatus = ftpFileSystem.listStatus(new Path("/new"));
> for(FileStatus fileStatus1 : fileStatus)
> System.out.println(fileStatus1);
> }
> {code}
> using test code below, the test results list below
> {code}
> FileStatus{path=ftp://test:123456@192.168.44.1/new; isDirectory=true; modification_time=1496716980000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> FileStatus{path=ftp://test:123456@192.168.44.1/; isDirectory=true; modification_time=1496716980000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> FileStatus{path=ftp://test:123456@192.168.44.1/new/hadoop; isDirectory=true; modification_time=1496716980000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> FileStatus{path=ftp://test:123456@192.168.44.1/new/HADOOP-14431-002.patch; isDirectory=false; length=2036; replication=1; blocksize=4096; modification_time=1495797780000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> FileStatus{path=ftp://test:123456@192.168.44.1/new/HADOOP-14486-001.patch; isDirectory=false; length=1322; replication=1; blocksize=4096; modification_time=1496716980000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> FileStatus{path=ftp://test:123456@192.168.44.1/new/hadoop-main; isDirectory=true; modification_time=1495797120000; access_time=0; owner=user; group=group; permission=---------; isSymlink=false}
> {code}
> In results above, {{FileStatus{path=ftp://test:123456@192.168.44.1/new; ……}} is obviously the current Path, and
> {{FileStatus{path=ftp://test:123456@192.168.44.1/;…… }} is obviously the parent Path.
> So, if we want to walk the directory recursively, it will stuck.
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