Description:
When running the RQG test falcon_tiny_insert one of the Gopher threads crashes due to a call to pread that returns 0. The error message is:
[Falcon] Error: pread on file /export/home/pb2/test/sb_1-389940-1236910720.83/mysql-6.0.11-alpha-linux-i686-test/vardirs/master-data/falcon_user.fts from page 1016 (offset 4161536) returned 0 bytes instead of 4096 (possible read behind EOF)
This crash happens during the initial test phase when the test is running SQL commands against the server.
The call stack looks like:
Program terminated with signal 6, Aborted.
#0 0x00d8d402 in __kernel_vsyscall ()
#0 0x00d8d402 in __kernel_vsyscall ()
#1 0x0089f067 in pthread_kill () from /lib/libpthread.so.0
#2 0x0882c892 in my_write_core (sig=6) at stacktrace.c:309
#3 0x082beab2 in handle_segfault (sig=6) at mysqld.cc:2690
#4 <signal handler called>
#5 0x00d8d402 in __kernel_vsyscall ()
#6 0x008a2181 in raise () from /lib/libpthread.so.0
#7 0x085599fc in Error::debugBreak () at Error.cpp:94
#8 0x08559a78 in Error::error (
string=0x89f02dc "pread on file %s from page %d (offset %lld) returned %d bytes instead of %d (possible read behind EOF)") at Error.cpp:71
#9 0x085c5810 in IO::readPage (this=0xb736c8ec, bdb=0xb7251d3c) at IO.cpp:301
#10 0x0864d653 in Cache::fetchPage (this=0xb6ffca78, dbb=0xb736c8e8,
pageNumber=1016, pageType=PAGE_btree, lockType=Exclusive) at Cache.cpp:289
#11 0x085b39f4 in Dbb::fetchPage (this=0xb736c8e8, pageNumber=1016,
pageType=PAGE_btree, lockType=Exclusive) at Dbb.cpp:219
#12 0x085b3c28 in Dbb::handoffPage (this=0xb736c8e8, bdb=0xb72526cc,
pageNumber=1016, pageType=PAGE_btree, lockType=Exclusive) at Dbb.cpp:268
#13 0x085d17a4 in IndexRootPage::findInsertionLeaf (dbb=0xb736c8e8, indexId=0,
indexKey=0xb23ec708, recordNumber=1022, transId=0, isRoot=0x0)
at IndexRootPage.cpp:311
#14 0x085d204c in IndexRootPage::indexMerge (dbb=0xb736c8e8, indexId=0,
logRecord=0xb23f20ec, transId=0) at IndexRootPage.cpp:828
#15 0x0861225d in SRLUpdateIndex::execute (this=0xb23f20ec)
at SRLUpdateIndex.cpp:217
#16 0x08612307 in SRLUpdateIndex::commit (this=0xb23f20ec)
at SRLUpdateIndex.cpp:195
#17 0x0862bf99 in SerialLogTransaction::commit (this=0xb7110300)
at SerialLogTransaction.cpp:92
#18 0x0862c08f in SerialLogTransaction::doAction (this=0xb7110300)
at SerialLogTransaction.cpp:158
#19 0x086561c6 in Gopher::gopherThread (this=0xb6ffdd68) at Gopher.cpp:71
#20 0x08656305 in Gopher::gopherThread (arg=0xb6ffdd68) at Gopher.cpp:37
#21 0x085829e1 in Thread::thread (this=0xb70083f8) at Thread.cpp:166
#22 0x08582bf1 in Thread::thread (parameter=0xb70083f8) at Thread.cpp:145
#23 0x0089a45b in start_thread () from /lib/libpthread.so.0
#24 0x007f1c4e in clone () from /lib/libc.so.6
How to repeat:
Seen once when running falcon_tiny_insert.
Suggested fix:
Avoid reading after EOF on the database file.
Description: When running the RQG test falcon_tiny_insert one of the Gopher threads crashes due to a call to pread that returns 0. The error message is: [Falcon] Error: pread on file /export/home/pb2/test/sb_1-389940-1236910720.83/mysql-6.0.11-alpha-linux-i686-test/vardirs/master-data/falcon_user.fts from page 1016 (offset 4161536) returned 0 bytes instead of 4096 (possible read behind EOF) This crash happens during the initial test phase when the test is running SQL commands against the server. The call stack looks like: Program terminated with signal 6, Aborted. #0 0x00d8d402 in __kernel_vsyscall () #0 0x00d8d402 in __kernel_vsyscall () #1 0x0089f067 in pthread_kill () from /lib/libpthread.so.0 #2 0x0882c892 in my_write_core (sig=6) at stacktrace.c:309 #3 0x082beab2 in handle_segfault (sig=6) at mysqld.cc:2690 #4 <signal handler called> #5 0x00d8d402 in __kernel_vsyscall () #6 0x008a2181 in raise () from /lib/libpthread.so.0 #7 0x085599fc in Error::debugBreak () at Error.cpp:94 #8 0x08559a78 in Error::error ( string=0x89f02dc "pread on file %s from page %d (offset %lld) returned %d bytes instead of %d (possible read behind EOF)") at Error.cpp:71 #9 0x085c5810 in IO::readPage (this=0xb736c8ec, bdb=0xb7251d3c) at IO.cpp:301 #10 0x0864d653 in Cache::fetchPage (this=0xb6ffca78, dbb=0xb736c8e8, pageNumber=1016, pageType=PAGE_btree, lockType=Exclusive) at Cache.cpp:289 #11 0x085b39f4 in Dbb::fetchPage (this=0xb736c8e8, pageNumber=1016, pageType=PAGE_btree, lockType=Exclusive) at Dbb.cpp:219 #12 0x085b3c28 in Dbb::handoffPage (this=0xb736c8e8, bdb=0xb72526cc, pageNumber=1016, pageType=PAGE_btree, lockType=Exclusive) at Dbb.cpp:268 #13 0x085d17a4 in IndexRootPage::findInsertionLeaf (dbb=0xb736c8e8, indexId=0, indexKey=0xb23ec708, recordNumber=1022, transId=0, isRoot=0x0) at IndexRootPage.cpp:311 #14 0x085d204c in IndexRootPage::indexMerge (dbb=0xb736c8e8, indexId=0, logRecord=0xb23f20ec, transId=0) at IndexRootPage.cpp:828 #15 0x0861225d in SRLUpdateIndex::execute (this=0xb23f20ec) at SRLUpdateIndex.cpp:217 #16 0x08612307 in SRLUpdateIndex::commit (this=0xb23f20ec) at SRLUpdateIndex.cpp:195 #17 0x0862bf99 in SerialLogTransaction::commit (this=0xb7110300) at SerialLogTransaction.cpp:92 #18 0x0862c08f in SerialLogTransaction::doAction (this=0xb7110300) at SerialLogTransaction.cpp:158 #19 0x086561c6 in Gopher::gopherThread (this=0xb6ffdd68) at Gopher.cpp:71 #20 0x08656305 in Gopher::gopherThread (arg=0xb6ffdd68) at Gopher.cpp:37 #21 0x085829e1 in Thread::thread (this=0xb70083f8) at Thread.cpp:166 #22 0x08582bf1 in Thread::thread (parameter=0xb70083f8) at Thread.cpp:145 #23 0x0089a45b in start_thread () from /lib/libpthread.so.0 #24 0x007f1c4e in clone () from /lib/libc.so.6 How to repeat: Seen once when running falcon_tiny_insert. Suggested fix: Avoid reading after EOF on the database file.