Re: [Commonsvfsgrid-developers] File listing error

[Meredith, D. (STFC,DL,ESC) <dav...@st...>]

hi Markus, 

i have seen a similar error before - it originated because of an invalid file name (started with a \ char) which upset vfs and caused exceptions like below. however, i subsequently added a patch that i thought? addressed this (unless there is a different cause). I'll take a look over the weekend - currently out of office, back next monday. 

dave

------------------------ 
David Meredith 
STFC eScience Centre 
Daresbury Laboratory 
Warrington Cheshire 
WA4 4AD 
Tel: 01925 603762(Direct Line) 
email: dav...@st... 



-----Original Message-----
From: Markus Binsteiner [mailto:ma...@vp...]
Sent: Tue 01/09/2009 11:19 PM
To: com...@li...
Subject: [Commonsvfsgrid-developers] File listing error
 
Hi. Me again....

I'm having another one of those problems I can't reliably reproduce:

I wrote this method which recursively lists (gridftp-)directories in 
order to get a listing of all the children files of a root folder and 
their absolute paths. That works most of the time without a problem. 
But, approximately once in ten times it fails with an error that looks like:

org.apache.commons.vfs.FileSystemException: Could not list the contents 
of folder "{0}".
    at 
org.apache.commons.vfs.provider.gridftp.cogjglobus.GridFtpMlsxFileObject.statChildren(GridFtpMlsxFileObject.java:376)
    at 
org.apache.commons.vfs.provider.gridftp.cogjglobus.GridFtpMlsxFileObject.doListChildrenResolved(GridFtpMlsxFileObject.java:280)
    at 
org.apache.commons.vfs.provider.AbstractFileObject.getChildren(AbstractFileObject.java:589)
    at 
org.vpac.grisu.control.serviceInterfaces.AbstractServiceInterface.getFolderListing(AbstractServiceInterface.java:1749)
    at 
org.vpac.grisu.control.serviceInterfaces.AbstractServiceInterface.ls(AbstractServiceInterface.java:1820)
    at 
org.vpac.grisu.frontend.model.job.JobObject.listJobDirectory(JobObject.java:708)
    at 
org.vpac.grisu.frontend.model.job.MultiPartJobObject.downloadResults(MultiPartJobObject.java:673)
    at 
org.vpac.grisu.clients.blender.GridBlenderCheck.execute(GridBlenderCheck.java:140)
    at 
org.vpac.grisu.clients.blender.GrisuBlender.main(GrisuBlender.java:41)
Caused by: org.globus.ftp.exception.ServerException: Server refused 
performing the request. Custom message:  (error code 1) [Nested 
exception message:  Custom message: Unexpected reply: 451 active 
connection to server failed
java.net.ConnectException: Connection refused
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:520)
    at java.net.Socket.connect(Socket.java:470)
    at java.net.Socket.<init>(Socket.java:367)
    at java.net.Socket.<init>(Socket.java:267)
    at org.globus.net.SocketFactory.createSocket(SocketFactory.java:74)
    at org.globus.net.SocketFactory.createSocket(SocketFactory.java:53)
    at 
org.globus.ftp.dc.GridFTPActiveConnectTask.execute(GridFTPActiveConnectTask.java:70)
    at org.globus.ftp.dc.TaskThread.run(TaskThread.java:71)
    at java.lang.Thread.run(Thread.java:595)
] [Nested exception is 
org.globus.ftp.exception.UnexpectedReplyCodeException:  Custom message: 
Unexpected reply: 451 active connection to server failed
java.net.ConnectException: Connection refused
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:520)
    at java.net.Socket.connect(Socket.java:470)
    at java.net.Socket.<init>(Socket.java:367)
    at java.net.Socket.<init>(Socket.java:267)
    at org.globus.net.SocketFactory.createSocket(SocketFactory.java:74)
    at org.globus.net.SocketFactory.createSocket(SocketFactory.java:53)
    at 
org.globus.ftp.dc.GridFTPActiveConnectTask.execute(GridFTPActiveConnectTask.java:70)
    at org.globus.ftp.dc.TaskThread.run(TaskThread.java:71)
    at java.lang.Thread.run(Thread.java:595)
]
    at 
org.globus.ftp.exception.ServerException.embedUnexpectedReplyCodeException(ServerException.java:101)
    at 
org.globus.ftp.exception.ServerException.embedUnexpectedReplyCodeException(ServerException.java:110)
    at org.globus.ftp.vanilla.TransferMonitor.run(TransferMonitor.java:195)
    at java.lang.Thread.run(Thread.java:595)


Did anybody see similar errors? Any ideas what could be the problem?
I didn't do any real investigation into this, but I will soon. Just 
wanted to know whether anybody (well, Dave :-) )has got an idea where to 
start looking, or maybe a hunch...

By the way: this all happens in the main thread, in case you are 
wondering. No fancy threading involved...

Cheers,
Markus

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