[mythtv-commits] Ticket #13068: Scheduler crashes before recording starts after backend has been running for a few days

MythTV noreply at mythtv.org
Sun Jul 16 02:18:22 UTC 2017


#13068: Scheduler crashes before recording starts after backend has been running
for a few days
---------------------------------+------------------------
 Reporter:  WilliamDeRieux@…     |          Owner:  gigem
     Type:  Bug Report - Crash   |         Status:  new
 Priority:  major                |      Milestone:  0.28.2
Component:  MythTV - Scheduling  |        Version:  0.28.1
 Severity:  medium               |     Resolution:
 Keywords:                       |  Ticket locked:  0
---------------------------------+------------------------

Comment (by WilliamDeRieux@…):

 I just installed some debug symbols for mysql and this now shows a more
 complete gdb backtrace:


 {{{
 2017-07-15 21:59:30.000847 I  Scheduler: FillRecordingDir: Starting
 2017-07-15 21:59:30.000882 I  Database object created: DBManager64
 2017-07-15 21:59:30.000887 I  New DB connection, total: 7
 2017-07-15 21:59:30.000889 I  Deleting idle DB connection...

 Thread 10 "Scheduler" received signal SIGPIPE, Broken pipe.
 [Switching to Thread 0x7fffc97fa700 (LWP 31594)]
 0x00007fffea53861f in __libc_send (fd=fd at entry=35,
 buf=buf at entry=0x7fffac056398, n=n at entry=5, flags=flags at entry=0) at
 ../sysdeps/unix/sysv/linux/x86_64/send.c:26
 26      ../sysdeps/unix/sysv/linux/x86_64/send.c: No such file or
 directory.
 (gdb) bt
 #0  0x00007fffea53861f in __libc_send (fd=fd at entry=35,
 buf=buf at entry=0x7fffac056398, n=n at entry=5, flags=flags at entry=0) at
 ../sysdeps/unix/sysv/linux/x86_64/send.c:26
 #1  0x00007fffd8670c2d in inline_mysql_socket_send
 (src_file=0x7fffd8757c28
 "/build/mariadb-10.1-Y_aRXm/mariadb-10.1-10.1.23/vio/viosocket.c",
 src_line=286, flags=0, n=5, buf=0x7fffac056398, mysql_socket=...) at
 ./include/mysql/psi/mysql_socket.h:759
 #2  0x00007fffd8670c2d in vio_write (vio=0x7fffac03d778,
 buf=0x7fffac056398 "\001", size=5) at ./vio/viosocket.c:285
 #3  0x00007fffd864c8f9 in net_real_write(NET*, uchar const*, size_t)
 (net=net at entry=0x7fffac072448, packet=0x7fffac056398 "\001",
 len=<optimized out>) at ./sql/net_serv.cc:661
 #4  0x00007fffd864cbe3 in net_flush(NET*) (net=net at entry=0x7fffac072448)
 at ./sql/net_serv.cc:363
 #5  0x00007fffd864d292 in net_write_command(NET*, uchar, uchar const*,
 size_t, uchar const*, size_t) (net=net at entry=0x7fffac072448,
 command=command at entry=1 '\001', header=header at entry=0x0,
 head_len=head_len at entry=0, packet=packet at entry=0x0, len=len at entry=0) at
 ./sql/net_serv.cc:501
 #6  0x00007fffd8644a04 in cli_advanced_command (mysql=0x7fffac072448,
 command=<optimized out>, header=0x0, header_length=0, arg=0x0,
 arg_length=0, skip_check=1 '\001', stmt=0x0)
     at ./sql-common/client.c:701
 #7  0x00007fffd8642008 in mysql_close_slow_part
 (mysql=mysql at entry=0x7fffac072448) at ./sql-common/client.c:3949
 #8  0x00007fffd864204a in mysql_close (mysql=0x7fffac072448) at ./sql-
 common/client.c:3961
 #9  0x00007ffff7feba51 in QMYSQLDriver::close() (this=0x7fffac0348b0) at
 ../../../sql/drivers/mysql/qsql_mysql.cpp:1455
 #10 0x00007ffff3cc649b in MSqlDatabase::~MSqlDatabase()
 (this=0x7fffac025ef0, __in_chrg=<optimized out>) at mythdbcon.cpp:102
 #11 0x00007ffff3cc8c59 in MDBManager::PurgeIdleConnections(bool)
 (this=0x555555a3f330, leaveOne=true) at mythdbcon.cpp:427
 #12 0x00007ffff3cc8071 in MDBManager::popConnection(bool)
 (this=0x555555a3f330, reuse=true) at mythdbcon.cpp:300
 #13 0x00007ffff3cc9d13 in MSqlQuery::InitCon(MSqlQuery::ConnectionReuse)
 (_reuse=MSqlQuery::kNormalConnection) at mythdbcon.cpp:545
 #14 0x000055555565eb4f in Scheduler::FillRecordingDir(QString const&,
 QString const&, QString const&, QDateTime const&, QDateTime const&,
 unsigned int, QString&, std::deque<RecordingInfo*,
 std::allocator<RecordingInfo*> > const&) (this=0x555555a74c10, title=...,
 hostname=..., storagegroup=..., recstartts=..., recendts=..., cardid=1,
 recording_dir=..., reclist=std::deque with 33 elements = {...}) at
 scheduler.cpp:4795
 #15 0x0000555555648341 in Scheduler::HandleRecording(RecordingInfo&,
 bool&, QDateTime&, QDateTime&, int) (this=0x555555a74c10,
     ri=..., statuschanged=@0x7fffc97f9a13: false, nextStartTime=...,
 nextWakeTime=..., prerollseconds=0) at scheduler.cpp:2735
 #16 0x0000555555642118 in Scheduler::run() (this=0x555555a74c10) at
 scheduler.cpp:2111
 #17 0x00007ffff3caaf75 in MThreadInternal::run() (this=0x555555a62e60) at
 mthread.cpp:79
 #18 0x00007fffea7f3da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 #19 0x00007fffea52f494 in start_thread (arg=0x7fffc97fa700) at
 pthread_create.c:333
 #20 0x00007fffe99d4aff in clone () at
 ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
 }}}

--
Ticket URL: <https://code.mythtv.org/trac/ticket/13068#comment:6>
MythTV <http://www.mythtv.org>
MythTV Media Center


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