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Leif Hedstrom commented on TS-3248: ----------------------------------- Is this new in v5.2.0, or in older versions too ? > 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 > Fix For: 5.3.0 > > > 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} > at line 244 ,mbuf = 0x0, so buf.writer() return NULL -- This message was sent by Atlassian JIRA (v6.3.4#6332)