Oknet Xu created TS-4232:
----------------------------
Summary: Crash in HostDB，During debug message generating
Key: TS-4232
URL: https://issues.apache.org/jira/browse/TS-4232
Project: Traffic Server
Issue Type: Bug
Components: HostDB
Reporter: Oknet Xu
STACK TRACE：
{code}
/usr/bin/traffic_server(crash_logger_invoke(int, siginfo_t*,
void*)+0xa2)[0x7fec78d2cf52]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xf8d0)[0x7fec76cfb8d0]
/usr/bin/traffic_server(+0x2acc5f)[0x7fec78edec5f]
/usr/bin/traffic_server(HostDBContinuation::dnsEvent(int,
HostEnt*)+0x370)[0x7fec78ee3130]
/usr/bin/traffic_server(DNSEntry::postEvent(int, Event*)+0x4b)[0x7fec78ec8feb]
/usr/bin/traffic_server(EThread::process_event(Event*,
int)+0x90)[0x7fec78fa4ee0]
/usr/bin/traffic_server(EThread::execute()+0x67f)[0x7fec78fa5aef]
/usr/bin/traffic_server(+0x3722da)[0x7fec78fa42da]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x80a4)[0x7fec76cf40a4]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fec75ca204d]
Segmentation fault (core dumped)
{code}
gdb with core file
{code}
Core was generated by `/usr/bin/traffic_server'.
Program terminated with signal 11, Segmentation fault.
#0 0x00007fec78edec5f in reply_to_cont (is_srv=false, r=0x7fec718beec0,
cont=0x7fec6d375a10) at HostDB.cc:612
612 Debug("hostdb", "RR of %d with %d good, 1st IP = %s",
r->rr()->rrcount, r->rr()->good, ats_ip_ntop(r->ip(), ipb, sizeof ipb))
(gdb) bt
#0 0x00007fec78edec5f in reply_to_cont (is_srv=false, r=0x7fec718beec0,
cont=0x7fec6d375a10) at HostDB.cc:612
#1 reply_to_cont (cont=0x7fec6d375a10, r=0x7fec718beec0, is_srv=false) at
HostDB.cc:585
#2 0x00007fec78ee3130 in HostDBContinuation::dnsEvent (this=<optimized out>,
event=<optimized out>, e=<optimized out>)
at HostDB.cc:1682
#3 0x00007fec78ec8feb in handleEvent (data=<optimized out>, event=600,
this=<optimized out>)
at ../../iocore/eventsystem/I_Continuation.h:146
#4 DNSEntry::postEvent (this=0x7fec6d236b10) at DNS.cc:1267
#5 0x00007fec78fa4ee0 in handleEvent (data=0x7fec64164fe0, event=1,
this=<optimized out>) at I_Continuation.h:146
#6 EThread::process_event (this=this@entry=0x7fec73e3f010,
e=e@entry=0x7fec64164fe0, calling_code=1) at UnixEThread.cc:131
#7 0x00007fec78fa5aef in EThread::execute (this=0x7fec73e3f010) at
UnixEThread.cc:182
#8 0x00007fec78fa42da in spawn_thread_internal (a=0x7fec7b6d1af0) at
Thread.cc:86
#9 0x00007fec76cf40a4 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007fec75ca204d in clone () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) p r
$1 = (HostDBInfo *) 0x7fec718beec0
(gdb) p *r
Cannot access memory at address 0x7fec718beec0
(gdb) p ipb
$2 =
"175.25.168.40\000\000\000p+\377x\354\177\000\000\366\377\377\377\000\000\000\000
\367\025d\354\177\000\000\240\234\243s\354\177"
{code}
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