[TS-3926] Segfault in traffic_server -R 1 after TS-3885

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Invalid
• Component/s: Core
• Labels: crash
• Assignee: Unassigned
• Reporter: Leif Hedstrom
• Created: 21/Sep/15 18:14
• Updated: 04/Feb/16 19:02
• Resolved: 16/Dec/15 19:15

Description

As of ~9/20, we are seeing intermittent crashes in the regressions. Here's an example crash:

#0  0x00000000004f11ac in Ptr<IOBufferBlock>::operator IOBufferBlock* (this=0x10) at ../../lib/ts/Ptr.h:300
#1  0x0000000000508802 in IOBufferReader::read_avail (this=0x0) at ../../iocore/eventsystem/P_IOBuffer.h:606
#2  0x0000000000771da8 in write_to_net_io (nh=0x7f0c5755cb90, vc=0x7f0c480a7670, thread=0x7f0c57559010)
    at ../../../iocore/net/UnixNetVConnection.cc:553
#3  0x0000000000771679 in write_to_net (nh=0x7f0c5755cb90, vc=0x7f0c480a7670, thread=0x7f0c57559010)
    at ../../../iocore/net/UnixNetVConnection.cc:422
#4  0x00000000007689d9 in NetHandler::mainNetEvent (this=0x7f0c5755cb90, event=5, e=0x1e8bdf0)
    at ../../../iocore/net/UnixNet.cc:532
#5  0x00000000005083a4 in Continuation::handleEvent (this=0x7f0c5755cb90, event=5, data=0x1e8bdf0)
    at ../../iocore/eventsystem/I_Continuation.h:146
#6  0x0000000000793570 in EThread::process_event (this=0x7f0c57559010, e=0x1e8bdf0, calling_code=5)
    at ../../../iocore/eventsystem/UnixEThread.cc:128
#7  0x0000000000793b27 in EThread::execute (this=0x7f0c57559010) at ../../../iocore/eventsystem/UnixEThread.cc:252
#8  0x0000000000792ad3 in spawn_thread_internal (a=0x1e5a3d0) at ../../../iocore/eventsystem/Thread.cc:86
#9  0x00007f0c5a523182 in start_thread (arg=0x7f0c57457700) at pthread_create.c:312
#10 0x00007f0c5982c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111