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Hi, we'll need to have a look, but from https://github.com/xrootd/xrootd/issues/1335#issuecomment-731113297 it's not really clear where the cause is. The LCMAPS plugin seems to be passing a NULL value as endpoint to the libargus-pep library, which then fails and ultimately causes a invalid cleanup in the latter (libargus-pep) which causes the SEGV. The question is how libargus-pep has a NULL value for the endpoint URL in https://github.com/argus-authz/argus-pep-api-c/blob/EMI-3/src/argus/pep.c#L492 while the LCMAPS plugin prints out a valid endpoint in https://ndpfsvn.nikhef.nl/viewvc/mwsec/tags/lcmaps-plugins-c-pep/1_3_1/src/c-pep/pep-c-interact.c?revision=18508&view=markup#l561? Is it possible that there is something odd in the config? It seems that somehow the pep_handle looses its endpoint, but it's not clear to me where that would happen. Is xrootd trying to call LCMAPS in a multi-threaded environment? That could be the issue (LCMAPS is not threadsafe). We would definitely need more logging to be able to say what's happening. Enabling LCMAPS debug logging (by setting `export LCMAPS_DEBUG_LEVEL=5`) would definitely help a lot. Also, we'd need the `lcmaps.db` file. Perhaps best to attach those to the GGUS ticket. -- You are receiving this because you commented. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1335#issuecomment-831515529 ######################################################################## 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