0000424: Seg fault from mcsmear

Notes
(0000619) davidl (administrator) 2014-12-03 15:44	I was able to find one issue that looked to be causing the initial crashes Tom was seeing. It was in the smear_bcal.cc file and a fix was checked in to the commissioning branch as revision . I was still unable to cleanly run mcsmear as it started crashing in a different place. This seems to be deep in the xdr reader code where it is getting a length that is equivalent to all bits set to 1 (i.e. very large number). This occurred around event 93 when I ran the following: > mcsmear hdgeant_POmega.hddm The backtrace is copied below from running on Linux. I also observed crashes at the same place when running on Mac OS X. It is worth noting that I also observe a problem using hddm-xml. It prints out a bunch of garbage for the "vals" field of bcalSiPMSpectrum structure in the event. This may indicate a corrupted output from hdgeant for the BCAL SiPM data. ---------------------------------------------------------------------------- Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fa4424b7700 (LWP 25944)] 0x0000000000d21ede in sgetn (this=0x7fa43c0218c0, s="") at /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/streambuf:335 335 { return this->xsgetn(__s, __n); } (gdb) bt #0 0x0000000000d21ede in sgetn (this=0x7fa43c0218c0, s="") at /usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/streambuf:335 0000001 xstream::xdr::istream::operator>> (this=0x7fa43c0218c0, s="") at external/xstream/src/xdr.cpp:133 0000002 0x00000000005b7e4d in hddm_s::BcalSiPMSpectrum::streamer (this=0x7fa43c1ef1f0, istr=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:16529 0000003 0x00000000005b74a5 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4961 0000004 0x00000000005cb651 in hddm_s::HDDM_ElementList<hddm_s::BcalSiPMSpectrum>::streamer (this=0x7fa43c5362a8, istr=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:428 0000005 0x00000000005b74a5 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4961 0000006 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000007 0x00000000005b7547 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4973 0000008 0x00000000005d11e7 in hddm_s::HDDM_ElementList<hddm_s::BcalCell>::streamer (this=<value optimized out>, istr=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:428 0000009 0x00000000005b74a5 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4961 0000010 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000011 0x00000000005b7547 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4973 #12 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000013 0x00000000005b7547 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4973 0000014 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000015 0x00000000005b7547 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4973 0000016 0x00000000005c39bf in hddm_s::HDDM_ElementList<hddm_s::PhysicsEvent>::streamer (this=<value optimized out>, istr=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:428 0000017 0x00000000005b74a5 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4961 0000018 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000019 0x00000000005b7547 in hddm_s::istream::sequencer (this=0x7fa43c000d60, object=<value optimized out>) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4973 0000020 0x00000000005b774d in hddm_s::istream::operator>> (this=0x7fa43c000d60, object=...) at /w/halld-scifs1a/home/davidl/builds/sim-recon-commissioning/Linux_CentOS6-x86_64-clang3.2/include/HDDM/hddm_s.hpp:4951 0000021 0x0000000000cf3a35 in hddm_s::istream::operator>> (this=0x7fa43c000d60, record=...) at .Linux_CentOS6-x86_64-clang3.2/libraries/HDDM/hddm_s++.cpp:217 0000022 0x0000000000ca89c6 in DEventSourceHDDM::GetEvent (this=0x7fa43c000f70, event=...) at libraries/HDDM/DEventSourceHDDM.cc:109 0000023 0x0000000000d65576 in jana::JEventSource::GetEvent (this=0x7fa43c000f70, event=...) at src/JANA/JEventSource.cc:54 0000024 0x0000000000d2711b in jana::JApplication::ReadEvent (this=0x7fffe24bc6d0, event=...) at src/JANA/JApplication.cc:655 0000025 0x0000000000d26f91 in jana::JApplication::EventBufferThread (this=0x7fffe24bc6d0) at src/JANA/JApplication.cc:600 0000026 0x0000000000d26c7f in LaunchEventBufferThread (arg=0x7fffe24bc6d0) at src/JANA/JApplication.cc:552 0000027 0x00000033466077f1 in start_thread () from /lib64/libpthread.so.0 0000028 0x0000003345ee5ccd in clone () from /lib64/libc.so.6 (gdb)

(0000647) davidl (administrator) 2015-06-10 09:42	This looks like it may have been fixed by Sean D. with revision 18034 on April 15, 2015. I've not heard recent reports of mcsmear crashes.

Issue History
Date Modified	Username	Field	Change
2014-12-02 16:52	davidl	New Issue
2014-12-03 06:03	davidl	Status	new => assigned
2014-12-03 06:03	davidl	Assigned To	=> davidl
2014-12-03 15:44	davidl	Note Added: 0000619
2015-06-10 09:42	davidl	Note Added: 0000647
2015-06-10 09:42	davidl	Status	assigned => resolved
2015-06-10 09:42	davidl	Resolution	open => fixed

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