Hi, I am seeing a python XRootD file open issue for the 5.6.1 client with a 5.5.5 server : ============================================================= XRootD Client Versin 5.6.1 XRootD Server Version v5.5.5 open(root://cmsio2.rc.ufl.edu:1094//store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/A64CCCF2-5C76-E711-B359-0CC47A78A3F8.root, flags=OpenFlags.READ, timeout=90) XRootDStatus.code=110 "[FATAL] TLS error: resource temporarily unavailable: Unable to connect to cmsio2.rc.ufl.edu; error_ssl" --------------------------------------------------------------------------- ValueError Traceback (most recent call last) /tmp/ipykernel_4179061/812350213.py in <module> 40 status.message.replace("\n", ""))) 41 #pass ---> 42 status, data = f.read(offset=0, size=65536, timeout=90) 43 if ( not status.ok ): 44 print(("\n%s\nread(offset=0, size=65536, timeout=90)\n" + \ /opt/cms/services/anaconda3/lib/python3.9/site-packages/XRootD/client/file.py in read(self, offset, size, timeout, callback) 124 return XRootDStatus(self.__file.read(offset, size, timeout, callback)) 125 --> 126 status, response = self.__file.read(offset, size, timeout) 127 return XRootDStatus(status), response 128 ValueError: I/O operation on closed file =============================================================== Here, XRootD Server is configured with TLS. If I remove TLS configuration of the 5.5.5 server, there is no issue. If I switch to 5.5.5 client, there is no issue. Is this expected? Thanks, Bockjoo ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1