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https://issues.apache.org/jira/browse/NET-160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12499681
]
L Venkataraman commented on NET-160:
------------------------------------
I will try this tommorow. I will report back in couple of days as this
problem occurs after 2-3 days of continuous run.
Thanks
> FTP Client API Hangs - Attached Scenario.
> -----------------------------------------
>
> Key: NET-160
> URL: https://issues.apache.org/jira/browse/NET-160
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 1.4
> Environment: Suse Enterprise Linux 9.0, Intel
> Reporter: Lvenkataraman
>
> FTP client hangs with the following error. Here is the truss output. The
> client hangs indefinitely and no work is being done other than this error
> when you truss the process. I use Java 1.5 to run this. We wrote a
> long-running ftp daemon and this happens after 20-23 hours of continuous
> running.
> Here is the code to pull files from the ftp server. This one lists files that
> are received after this particular "incal" time (currently it lists but the
> intention is to implement an incremental download). We initially thought
> doing periodic noop would keep the client alive by sending dummy commands to
> the server. But we found this probelm still occurs.
> public void ListIncrementalFiles (String directory, Calendar incal)
> {
> try
> {
> FTPFile[] files = listFiles(directory);
>
> int total_files = 0;
>
> System.out.println("FileName\tFileSize\t\tDate Time
> Stamp");
> for (int i = 0; i < files.length; i++)
> {
>
>
> FTPFile file = files[i];
> if ((i % 1000) == 0)
> {
> System.out.println("noop
> occurred at this instance---> " + i + "\n");
> noop();
> }
>
> if (file.isFile())
> {
> Calendar c =
> file.getTimestamp();
>
>
> if (c.after(incal) ||
> c.equals(incal))
> {
>
>
> System.out.println(file.getName() + "\t" + file.getSize() + "\t\t" +
> c.getTime());
> total_files++;
> }
> }
>
> }
> System.out.println("Total Files in the listing ----> "
> + total_files);
> }
> catch (Exception e)
> {
> System.out.println("FTP Getfiles exception occured");
> e.printStackTrace();
> }
>
> }
> ---------------------------------------------------------------------------------------------------------------------------------Truss
> output begins--------------------------------------------------------
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /9: lwp_park(0x00000000, 0) (sleeping...)
> /3: lwp_cond_wait(0x000B77C0, 0x000B77A8, 0x00000000, 0) (sleeping...)
> /8: lwp_cond_wait(0x0014A908, 0x0014A8F0, 0x00000000, 0) (sleeping...)
> /10: lwp_cond_wait(0x000366E8, 0x000366D0, 0x00000000, 0) (sleeping...)
> /1: pollsys(0x00000000, 0, 0xFFBFEB60, 0x00000000) (sleeping...)
> /11: lwp_cond_wait(0x00036778, 0x00036760, 0x00000000, 0) (sleeping...)
> /4: lwp_cond_wait(0x000B77C0, 0x000B77A8, 0x00000000, 0) (sleeping...)
> /12: lwp_cond_wait(0x00036778, 0x00036760, 0x00000000, 0) (sleeping...)
> /2: lwp_cond_wait(0x000B77C0, 0x000B77A8, 0x00000000, 0) (sleeping...)
> /7: lwp_cond_wait(0x00149F98, 0x00149F80, 0x00000000, 0) (sleeping...)
> /5: lwp_cond_wait(0x000B77C0, 0x000B77A8, 0x00000000, 0) (sleeping...)
> /13: lwp_cond_wait(0x00034958, 0x00034940, 0x00000000, 0) (sleeping...)
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /6: lwp_cond_wait(0x00035F08, 0x00035EF0, 0xB477FBE0, 0) Err#62 ETIME
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> /14: pollsys(0x00000000, 0, 0xB3F7FC10, 0x00000000) = 0
> ------------------------------------------------------------------------------------------Truss
> output
> ends-------------------------------------------------------------------------------------------
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