[jira] [Created] (TS-3248) 5.2.0 Segmentation fault

["Qiang Li (JIRA)" <ji...@apache.org>]

Qiang Li created TS-3248:
----------------------------

             Summary: 5.2.0 Segmentation fault
                 Key: TS-3248
                 URL: https://issues.apache.org/jira/browse/TS-3248
             Project: Traffic Server
          Issue Type: Bug
            Reporter: Qiang Li


Segmentation fault sometime
{code}
(gdb) bt
#0  0x000000000073334a in operator IOBufferBlock* (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at ../../lib/ts/Ptr.h:326
#1  first_write_block (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at ../../iocore/eventsystem/I_IOBuffer.h:920
#2  read_from_net (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at UnixNetVConnection.cc:244
#3  0x0000000000727a62 in NetHandler::mainNetEvent (this=0x2b4d9e1e8b50, event=<value optimized out>, e=<value optimized out>) at UnixNet.cc:399
#4  0x00000000007538f5 in handleEvent (this=0x2b4d9e1e5010, e=0x2b4d9f806d80, calling_code=5) at I_Continuation.h:146
#5  EThread::process_event (this=0x2b4d9e1e5010, e=0x2b4d9f806d80, calling_code=5) at UnixEThread.cc:144
#6  0x000000000075404b in EThread::execute (this=0x2b4d9e1e5010) at UnixEThread.cc:268
#7  0x0000000000752d3a in spawn_thread_internal (a=0x157a1b0) at Thread.cc:88
#8  0x00002b4d9b0fa9d1 in start_thread () from /lib64/libpthread.so.0
#9  0x00002b4d9c0f19dd in clone () from /lib64/libc.so.6
(gdb) f 2
#2  read_from_net (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at UnixNetVConnection.cc:244
244	    IOBufferBlock *b = buf.writer()->first_write_block();
(gdb) l
239	  // read data
240	  int64_t rattempted = 0, total_read = 0;
241	  int niov = 0;
242	  IOVec tiovec[NET_MAX_IOV];
243	  if (toread) {
244	    IOBufferBlock *b = buf.writer()->first_write_block();
245	    do {
246	      niov = 0;
247	      rattempted = 0;
248	      while (b && niov < NET_MAX_IOV) {
(gdb) p buf
$1 = (MIOBufferAccessor &) @0x2aaac1111608: {mbuf = 0x0, entry = 0x0}
(gdb) p toread 
$2 = 7768
(gdb) 
{code}



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