SIGPIPE handling of xbstream

read(0, "", 327721) = 0

should probably cause xbstream to exit, ie, when it gets nothing from the network. (Now, it depends on how xbstream handles stream and listens on stdin)

(gdb) bt full
#0 0x00007f530e02ea7d in read () from /usr/lib/libpthread.so.0
No symbol table info available.
#1 0x000000000040a9f8 in read (__nbytes=65577, __buf=0x7f530e606fe7, __fd=0) at /usr/include/bits/unistd.h:44
No locals.
#2 my_read (Filedes=Filedes@entry=0,
    Buffer=0x7f530e606fe7 "I\352w6\347\003\177\375\276\022˨\033\312\070>@h\245\303M\206l\230ܤ$\216\320mB\266\262o\354\200߲\003(dxD<}\300\ah@\030\005\260\177\275\317\017\027\300 \231C\213ӵ\211\061zM\037\f\224\363b\017\275\241\201\375#;\006O\243\063m\325ס\200\n\334\021\344\347*\371\200b\246\021L\207f\t\303\315L\276:\216\253\060\312\vɎED\206b\236٫A\211m \026\321=IW\034|\204\375=pV$\226\221\035\071I\376\352S\213\370\234\062\207\377\240\235\363)VR\247N\323\v+.o\001\354@(\346\324\066Ed\352~\313S\302\373x\213\356\356\036\025\354\225[E\274", <incomplete sequence \347>, Count=65577, MyFlags=MyFlags@entry=528)
    at /dev/shm/xtrabackup/src/percona-xtrabackup-2.1.7/Percona-Server-5.5/mysys/my_read.c:50
        readbytes = <optimized out>
        save_count = 1048576
#3 0x00000000004038d1 in xb_stream_read_chunk (stream=stream@entry=0x2808260, chunk=chunk@entry=0x7fff9fecf150) at xbstream_read.c:212
        tmpbuf = "\001o\254\217\000\000\000\000\000\000\340\001\000\000\000"
        ptr = 0x7fff9fecf07a "\340\001"
        pathlen = <optimized out>
        tlen = <optimized out>
        tbytes = <optimized out>
        ullval = <optimized out>
        checksum_exp = 2410442497
        checksum = <optimized out>
        fd = 0
#4 0x0000000000402bb0 in mode_extract (argv=<optimized out>, argc=<optimized out>) at xbstream.c:385
        stream = 0x2808260
        res = <optimized out>
        chunk = {
          flags = 0 '\000',
          type = XB_CHUNK_TYPE_PAYLOAD,
          pathlen = 7,
          path = "bigfile\000S\177\000\000\365\020@\000\000\000\000\000x]\330\fS\177\000\000\340\002@\000\000\000\000\000\000\000\000\000\005\000\000\000o\003\000\000\001", '\000' <repeats 11 times>, "\210df\016S\177\000\000\360\362\354\237\377\177\000\000\020\301a\016S\177\000\000\030\363\354\237\377\177\000\000\060af\016S\177\000\000\001\000\000\000\000\000\000\000\204\346D\016S\177\000\000\000\000\000\000\000\000\000\000\020\301a\016S\177\000\000\005\000\000\000S\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000S\177\000\000\060af\016S\177\000\000\000\000\000\000\000\000\000\000\272r\002\016S\177\000\000\320I\327\fS\177\000\000\000\334\021\rS\177\000\000\000\000\000\000\000\000\000\000"...,
          length = 1048576,
          offset = 31457280,
          data = 0x7f530e517010,
          checksum = 122782283
        }
        filehash = {
          key_offset = 0,
          key_length = 0,
          blength = 2,
          records = 1,
          flags = 0,
          array = {
            buffer = 0x28082e0 "\377\377\377\377",
            elements = 1,
            max_element = 16,
            alloc_increment = 32,
            size_of_element = 16
          },
          get_key = 0x402980 <get_file_entry_key>,
          free = 0x402af0 <file_entry_free>,
          charset = 0x841020 <my_charset_bin>
        }
        entry = <optimized out>
        ds_ctxt = 0x2808290
---Type <return> to cont...

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-398