After upgrading our servers to xrootd 4.8.0, a python exception started to be thrown as per the title, whereas the same client code did not throw any exceptions with xrootd 4.7 and earlier versions.

A way to reproduce the issue is:

from XRootD import client as XrdClient
fs = XrdClient.FileSystem('root://your-favourite-xrootd-server')
status, resp = fs.query(QueryCode.OPAQUE, "/boguspath")

And the output is:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.6/site-packages/XRootD/client/filesystem.py", line 141, in query
    status, response = self.__fs.query(querycode, arg, timeout)
SystemError: bad format char passed to Py_BuildValue

(while it should be "The server answered with an error")

With @simonmichal we tried some combinations and it appears as the bug was there already before 4.8, but it is somehow exposed only now. The reason for this is that if a valid path (e.g. "/tmp") is passed to fs.query(), then the same exception is thrown also by an older xrootd server.

To be noted that we see this on CASTOR by issuing a query handled by fsctl() on the server side.
(For reference, the CASTOR Jira issue is at https://its.cern.ch/jira/browse/CASTOR-5501, but a CERN account is needed to see it. All relevant information has been reported here though).

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub, or mute the thread.

{"api_version":"1.0","publisher":{"api_key":"05dde50f1d1a384dd78767c55493e4bb","name":"GitHub"},"entity":{"external_key":"github/xrootd/xrootd","title":"xrootd/xrootd","subtitle":"GitHub repository","main_image_url":"https://cloud.githubusercontent.com/assets/143418/17495839/a5054eac-5d88-11e6-95fc-7290892c7bb5.png","avatar_image_url":"https://cloud.githubusercontent.com/assets/143418/15842166/7c72db34-2c0b-11e6-9aed-b52498112777.png","action":{"name":"Open in GitHub","url":"https://github.com/xrootd/xrootd"}},"updates":{"snippets":[{"icon":"DESCRIPTION","message":"\"bad format char passed to Py_BuildValue\" exception with the python bindings (#642)"}],"action":{"name":"View Issue","url":"https://github.com/xrootd/xrootd/issues/642"}}}

Use REPLY-ALL to reply to list

To unsubscribe from the XROOTD-DEV list, click the following link:
https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1