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John I ran another 24h test, after 23h one xrootd failed. This is probably related to the cancellation code you are working on: (gdb) where #0 0x00007f41023ad5e9 in raise () from /lib64/libc.so.6 #1 0x00007f41023aecf8 in abort () from /lib64/libc.so.6 #2 0x00007f4102cb19b5 in __gnu_cxx::__verbose_terminate_handler() () from /lib64/libstdc++.so.6 #3 0x00007f4102caf926 in ?? () from /lib64/libstdc++.so.6 #4 0x00007f4102cae8e9 in ?? () from /lib64/libstdc++.so.6 #5 0x00007f4102caf554 in __gxx_personality_v0 () from /lib64/libstdc++.so.6 #6 0x00007f4102748913 in ?? () from /lib64/libgcc_s.so.1 #7 0x00007f4102748e47 in _Unwind_Resume () from /lib64/libgcc_s.so.1 #8 0x00007f4100c85245 in lsst::qserv::wdb::ChunkResourceMgr::Impl::release (this=0x1ccfc80, i=...) at build/wdb/ChunkResource.cc:398 #9 0x00007f4100c83696 in lsst::qserv::wdb::ChunkResource::~ChunkResource (this=0x7f40f1986b20, __in_chrg=<optimized out>) at build/wdb/ChunkResource.cc:131 #10 0x00007f4100c91f0b in lsst::qserv::wdb::QueryAction::Impl::_dispatchChannel (this=0x7f40c4a8dd80) at build/wdb/QueryAction.cc:392 #11 0x00007f4100c905a7 in lsst::qserv::wdb::QueryAction::Impl::act (this=0x7f40c4a8dd80) at build/wdb/QueryAction.cc:187 #12 0x00007f4100c93212 in lsst::qserv::wdb::QueryAction::operator() (this=0x7f40c487db78) at build/wdb/QueryAction.cc:451 #13 0x00007f4100c75f46 in lsst::qserv::wcontrol::ForemanImpl::Runner::operator() (this=0x7f40e80d98c0) at build/wcontrol/Foreman.cc:302 #14 0x00007f4100c82cf0 in std::_Bind_simple<lsst::qserv::wcontrol::ForemanImpl::Runner ()>::_M_invoke<>(std::_Index_tuple<>) (this=0x7f40e80d98c0) at /usr/include/c++/4.8.2/functional:1732 #15 0x00007f4100c82a8b in std::_Bind_simple<lsst::qserv::wcontrol::ForemanImpl::Runner ()>::operator()() (this=0x7f40e80d98c0) at /usr/include/c++/4.8.2/functional:1720 #16 0x00007f4100c8280c in std::thread::_Impl<std::_Bind_simple<lsst::qserv::wcontrol::ForemanImpl::Runner ()> >::_M_run() (this=0x7f40e80d98a8) at /usr/include/c++/4.8.2/thread:115 tail of the xrootd log file: 0901 20:38:42.045 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ScanScheduler.cc:210) - Adding new task: 9358 : SELECT COUNT(*) AS QS1_COUNT FROM LSST.Object_9358 AS QST_1_ WHERE y_instFlux>u_instFlux 0901 20:38:42.046 [0x7f40f1b89700] DEBUG GroupSched (build/wsched/GroupScheduler.cc:139) - _getNextTasks(3)>->-> 0901 20:38:42.046 [0x7f40f1b89700] DEBUG GroupSched (build/wsched/GroupScheduler.cc:154) - _getNextTasks <<<<< 0901 20:38:42.046 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ScanScheduler.cc:172) - _getNextTasks(31)>->-> 0901 20:38:42.046 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ChunkDisk.cc:199) - ChunkDisk busyness: yes 0901 20:38:42.046 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ChunkDisk.cc:171) - ChunkDisk getNext: current= (scan=8879, cached=8571,8772,) candidate=9220 0901 20:38:42.046 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ChunkDisk.cc:184) - ChunkDisk denying task 0901 20:38:42.046 [0x7f40f1b89700] DEBUG ScanSched (build/wsched/ScanScheduler.cc:196) - _getNextTasks <<<<< 0901 20:38:42.046 [0x7f40f1b89700] DEBUG BlendSched (build/wsched/BlendScheduler.cc:211) - BlendScheduler: no tasks available 0901 20:38:42.046 [0x7f40f1b89700] INFO root (build/xrdsvc/SsiSession.cc:120) - Enqueued TaskMsg for Resource(/chk/LSST/9358) in 0.000835 seconds ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1