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From Stefan Eissing <stefan.eiss...@greenbytes.de>
Subject Re: hanging apache httpd processes
Date Tue, 18 Apr 2017 13:22:18 GMT
Here we go: https://github.com/icing/mod_h2/releases/tag/v1.10.2

> Am 18.04.2017 um 15:11 schrieb Stefan Eissing <stefan.eissing@greenbytes.de>:
> 
> In transit. Just some minutes away...
> 
>> Am 18.04.2017 um 15:06 schrieb Stefan Priebe - Profihost AG <s.priebe@profihost.ag>:
>> 
>> 
>> Am 18.04.2017 um 15:03 schrieb Stefan Eissing:
>>> Stefan,
>>> 
>>> that is a 1.10.0, right? That was the first version without nested locking and
I fixed 2 possible dead locks in 1.10.1. 
>>> 
>>> I am about to release a 1.10.2 with added conformity checks and a fix for client
omitting EOF flags. Could you give that one a try?
>> 
>> Yes sure where is 1.10.2?
>> 
>> Stefan
>> 
>>> 
>>> -Stefan
>>> 
>>>> Am 18.04.2017 um 14:57 schrieb Stefan Priebe - Profihost AG <s.priebe@profihost.ag>:
>>>> 
>>>> Hi,
>>>> 
>>>> i saw that all of them are still serving one h2 connection.
>>>> 
>>>> server-status:
>>>> 0-3	32375	42/64/181	G	30.09	1020776	214	1285.1	2.40	5.81
>>>> h081217236127.dyn.cm.kabsi.at	h2	XXXX:443	GET
>>>> /wp-content/uploads/0000Bloglr212222-8003asd.jpg HTTP/2.0
>>>> 
>>>> And they all have Mode of operation => G
>>>> 
>>>> thread apply all bt full shows:
>>>> #0  0x00007f8e80b687fc in __lll_lock_wait () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #1  0x00007f8e80b6b6f8 in _L_cond_lock_886 () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #2  0x00007f8e80b6b464 in __pthread_mutex_cond_lock () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #3  0x00007f8e80b6650a in pthread_cond_timedwait@@GLIBC_2.3.2 () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #4  0x00007f8e80d92322 in apr_thread_cond_timedwait
>>>> (cond=0x7f8d7846bc70, mutex=0x7f8d7846bc20, timeout=60000000) at
>>>> locks/unix/thread_cond.c:89
>>>>      rv = <optimized out>
>>>>      then = <optimized out>
>>>>      abstime = {tv_sec = 1491843095, tv_nsec = 700198000}
>>>> #5  0x000055e62c0951c5 in r_wait_space (premain=<synthetic pointer>,
>>>> pbl=0x7f8de853da60, block=APR_BLOCK_READ, beam=0x7f8d7846bb08) at
>>>> h2_bucket_beam.c:337
>>>>      status = <optimized out>
>>>> #6  append_bucket (pbl=0x7f8de853da60, block=APR_BLOCK_READ,
>>>> b=0x7f8d7846dd38, beam=0x7f8d7846bb08) at h2_bucket_beam.c:776
>>>>      data = 0x7f8de853dac8 "\240\037"
>>>>      len = 0
>>>>      space_left = 0
>>>>      status = <optimized out>
>>>> #7  h2_beam_send (beam=0x7f8d7846bb08, sender_bb=0x7f8d7864ba90,
>>>> block=APR_BLOCK_READ) at h2_bucket_beam.c:906
>>>>      force_report = 1
>>>>      b = 0x7f8d7846dd38
>>>>      status = 0
>>>>      bl = {mutex = 0x7f8d7846bc20, leave = 0x55e62c094250
>>>> <mutex_leave>, leave_ctx = 0x0}
>>>> #8  0x000055e62c08f3aa in send_out (task=0x7f8d7846f740,
>>>> bb=0x7f8d7864ba90, block=1) at h2_task.c:100
>>>>      written = 8096
>>>>      left = 140245585033024
>>>>      status = 1
>>>> #9  0x000055e62c08f976 in slave_out (task=0x7f8d7846f740,
>>>> f=0x7f8d7846bdd8, bb=0x7f8d7864ba90) at h2_task.c:177
>>>>      status = -512
>>>>      flush = 0
>>>>      blocking = 1
>>>> #10 0x000055e62c08fbfd in h2_filter_slave_output (filter=0x7f8d7846bdd8,
>>>> brigade=0x7f8d7864ba90) at h2_task.c:370
>>>>      task = 0x7f8d7846f740
>>>>      status = <optimized out>
>>>> #11 0x000055e62bffc01c in ap_content_length_filter (f=0x7f8d78472ca8,
>>>> b=0x7f8d7864ba90) at protocol.c:1713
>>>>      r = 0x7f8d78471750
>>>>      ctx = 0x7f8d7864bc90
>>>>      e = 0x7f8d7864ba98
>>>>      eblock = (unknown: 2159446012)
>>>> #12 0x000055e62c04853d in deflate_out_filter (f=0x7f8d7864b650,
>>>> bb=0x7f8d7864b8f8) at mod_deflate.c:961
>>>>      rv = -512
>>>>      r = 0x7f8d78471750
>>>>      ctx = 0x7f8d7864b9a8
>>>>      len = 8096
>>>>      blen = 1157663
>>>>      data = 0x7f8d7e40b000 "/*! jQuery v2.1.4 | (c) 2005, 2015 jQuery
>>>> Foundation, Inc. | jquery.org/license
>>>> */\n!function(a,b){\"object\"==typeof module&&\"object\"==typeof
>>>> module.exports?module.exports=a.document?b(a,!0):function(a)"...
>>>>      c = 0x55e62c7a7498
>>>> #13 0x000055e62c044b1d in filter_harness (f=0x7f8d7846bc28, bb=0x80) at
>>>> mod_filter.c:323
>>>>      ret = -512
>>>>      cachecontrol = 0xfffffffffffffe00 <error: Cannot access memory
>>>> at address 0xfffffffffffffe00>
>>>>      filter = 0xe
>>>> #14 0x000055e62c002242 in default_handler (r=0x7f8d78471750) at core.c:4746
>>>>      c = 0x7f8d7846b720
>>>>      bb = 0x7f8d7864b8f8
>>>>      e = 0xfffffffffffffe00
>>>>      d = 0x7f8d7864dfa0
>>>>      fd = 0x7f8d7864b7b8
>>>>      bld_content_md5 = 2019866872
>>>> #15 0x000055e62c014130 in ap_run_handler (r=r@entry=0x7f8d78471750) at
>>>> config.c:170
>>>>      pHook = <optimized out>
>>>>      n = 11
>>>>      rv = -1
>>>> #16 0x000055e62c014679 in ap_invoke_handler (r=0x7f8d78471750) at
>>>> config.c:434
>>>>      handler = <optimized out>
>>>>      p = <optimized out>
>>>>      result = <optimized out>
>>>>      old_handler = 0x0
>>>>      ignore = <optimized out>
>>>> #17 0x000055e62c04dcb2 in ap_process_async_request (r=0x7f8d78471750) at
>>>> http_request.c:436
>>>>      c = 0x7f8d7846b720
>>>>      access_status = 0
>>>> #18 0x000055e62c04de50 in ap_process_request (r=0x7f8d78471750) at
>>>> http_request.c:471
>>>>      bb = 0x7f8d7846bd80
>>>>      c = 0x7f8d7846b720
>>>>      rv = -512
>>>> #19 0x000055e62c08ec32 in h2_task_process_request (c=<optimized out>,
>>>> task=<optimized out>) at h2_task.c:666
>>>>      req = 0x7f8d78471750
>>>>      cs = 0x7f8d7846bd80
>>>>      r = 0x7f8d78471750
>>>> #20 h2_task_process_conn (c=0x7f8d7846bc28) at h2_task.c:713
>>>>      ctx = 0x7f8d7846bd80
>>>> #21 0x000055e62c01e130 in ap_run_process_connection (c=0x7f8d7846b720)
>>>> at connection.c:42
>>>>      pHook = <optimized out>
>>>>      n = 0
>>>>      rv = -1
>>>> #22 0x000055e62c09012b in h2_task_do (task=0x7f8d7846f740,
>>>> thread=0x55e62cb0ce70, worker_id=0) at h2_task.c:623
>>>>      c = 0x7f8d7846b720
>>>> #23 0x000055e62c093619 in slot_run (thread=0x55e62cb0ce70,
>>>> wctx=0x55e62c8b9268) at h2_workers.c:217
>>>>      slot = 0x55e62c8b9268
>>>> #24 0x00007f8e80b620a4 in start_thread () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #25 0x00007f8e8089762d in clone () from /lib/x86_64-linux-gnu/libc.so.6
>>>> No symbol table info available.
>>>> 
>>>> Thread 3 (Thread 0x7f8da678c700 (LWP 28251)):
>>>> #0  0x00007f8e80b687fc in __lll_lock_wait () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #1  0x00007f8e80b644b9 in _L_lock_909 () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #2  0x00007f8e80b642e0 in pthread_mutex_lock () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #3  0x000055e62c0942a8 in enter_yellow (pbl=0x7f8da678a8d0,
>>>> beam=0x7f8d7846bb08) at h2_bucket_beam.c:217
>>>>      ctx = <optimized out>
>>>>      enter = <optimized out>
>>>> #4  h2_beam_emitted (proxy=0x7f8cd435bd38, beam=0x7f8d7846bb08) at
>>>> h2_bucket_beam.c:352
>>>>      bl = {mutex = 0x7f8d7846bc20, leave = 0x55e62c094250
>>>> <mutex_leave>, leave_ctx = 0x7f8c9806b3ed}
>>>>      b = <optimized out>
>>>>      next = <optimized out>
>>>> #5  beam_bucket_destroy (data=0x7f8cd435bd38) at h2_bucket_beam.c:106
>>>>      data = 0x7f8cd435bd38
>>>>      d = 0x7f8cd435bd38
>>>> #6  0x00007f8e80fb584c in apr_brigade_cleanup (data=0x7f8d1002d220) at
>>>> buckets/apr_brigade.c:44
>>>>      b = 0x7f8d1002d220
>>>>      e = 0x7f8cd435bab8
>>>> #7  0x000055e62c094be4 in h2_beam_leave (beam=0x7f8d7846bb08) at
>>>> h2_bucket_beam.c:701
>>>>      bl = {mutex = 0x7f8d7846bc20, leave = 0x55e62c094250
>>>> <mutex_leave>, leave_ctx = 0x4}
>>>> #8  0x000055e62c08a7e2 in h2_stream_rst (stream=0x7f8d1002cc00,
>>>> error_code=8) at h2_stream.c:608
>>>> No locals.
>>>> #9  0x000055e62c084870 in on_stream_close_cb (ngh2=<optimized out>,
>>>> stream_id=<optimized out>, error_code=8, userp=0x7f8d10135620) at
>>>> h2_session.c:266
>>>> #10 0x00007f8e81666c22 in ?? () from
>>>> /usr/lib/x86_64-linux-gnu/libnghttp2.so.14
>>>> No symbol table info available.
>>>> #11 0x00007f8e8166823d in ?? () from
>>>> /usr/lib/x86_64-linux-gnu/libnghttp2.so.14
>>>> No symbol table info available.
>>>> #12 0x00007f8e8166c7cb in nghttp2_session_mem_recv () from
>>>> /usr/lib/x86_64-linux-gnu/libnghttp2.so.14
>>>> No symbol table info available.
>>>> #13 0x000055e62c079695 in recv_RAW_DATA (c=<optimized out>,
>>>> cin=0x7f8d10135cb0, block=APR_NONBLOCK_READ, b=0x7f8ca80e4a88) at
>>>> h2_filter.c:59
>>>>      status = 0
>>>>      len = 13
>>>>      data = 0x7f8c9806b3e0 ""
>>>>      session = 0x7f8d10135620
>>>>      n = <optimized out>
>>>> #14 recv_RAW_brigade (c=<optimized out>, cin=0x7f8d10135cb0,
>>>> bb=0x7f8d10135e18, block=APR_NONBLOCK_READ) at h2_filter.c:100
>>>>      status = 0
>>>>      b = 0x7f8ca80e4a88
>>>>      consumed = <optimized out>
>>>> #15 0x000055e62c07a29c in h2_filter_core_input (f=0x7f8c9806d738,
>>>> brigade=0x7f8d10135ce0, mode=AP_MODE_READBYTES, block=APR_NONBLOCK_READ,
>>>> readbytes=0) at h2_filter.c:182
>>>>      cin = 0x7f8d10135cb0
>>>>      saved_timeout = -1
>>>> #16 0x000055e62c084b82 in session_read (block=<optimized out>,
>>>> readlen=491520, session=0x7f8d10135620) at h2_session.c:1481
>>>>      status = <optimized out>
>>>>      rstatus = 0
>>>>      c = 0x7f8d7808e858
>>>>      read_start = 1919
>>>> #17 h2_session_read (session=0x7f8d10135620, block=<optimized out>)
at
>>>> h2_session.c:1538
>>>> No locals.
>>>> #18 0x000055e62c08857f in h2_session_process (session=0x7f8d10135620,
>>>> async=128) at h2_session.c:2126
>>>>      c = 0x7f8d7808e858
>>>>      mpm_state = 1
>>>>      trace = 0
>>>> #19 0x000055e62c0789ce in h2_conn_run (ctx=<optimized out>,
>>>> c=0x7f8d7808e858) at h2_conn.c:203
>>>>      status = <optimized out>
>>>>      mpm_state = 0
>>>>      session = 0x7f8d10135620
>>>> #20 0x000055e62c07bb21 in h2_h2_process_conn (c=0x7f8d7808e858) at
>>>> h2_h2.c:659
>>>>      ctx = 0x7f8c9806d668
>>>> #21 0x000055e62c01e130 in ap_run_process_connection (c=0x7f8d7808e858)
>>>> at connection.c:42
>>>>      pHook = <optimized out>
>>>>      n = 2
>>>>      rv = -1
>>>> #22 0x000055e62c0b8830 in process_socket (my_thread_num=<optimized out>,
>>>> my_child_num=<optimized out>, cs=0x7f8d7808e7c8, sock=<optimized
out>,
>>>> p=<optimized out>, thd=<optimized out>) at event.c:1134
>>>>      c = 0x55e62c0e3748
>>>>      sbh = 0x7f8d7808e7b0
>>>> #23 worker_thread (thd=0x7f8d7846bc28, dummy=0x80) at event.c:2137
>>>>      process_slot = 5
>>>>      thread_slot = 121
>>>>      csd = 0x7f8d7808e5c0
>>>>      cs = 0x0
>>>>      ptrans = 0x7f8d7808e538
>>>>      is_idle = 2013849544
>>>>      te = 0x0
>>>> #24 0x00007f8e80b620a4 in start_thread () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #25 0x00007f8e8089762d in clone () from /lib/x86_64-linux-gnu/libc.so.6
>>>> No symbol table info available.
>>>> 
>>>> Thread 2 (Thread 0x7f8d7ef3d700 (LWP 28405)):
>>>> #0  0x00007f8e80897c03 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
>>>> No symbol table info available.
>>>> #1  0x00007f8e80d99a93 in impl_pollset_poll (pollset=0x55e62c8459f0,
>>>> timeout=<optimized out>, num=0x7f8d7ef3ce6c, descriptors=0x7f8d7ef3ce88)
>>>> at poll/unix/epoll.c:266
>>>>      ret = <optimized out>
>>>>      i = <optimized out>
>>>>      j = <optimized out>
>>>>      rv = 0
>>>>      fdptr = <optimized out>
>>>> #2  0x000055e62c0ba297 in listener_thread (thd=0x2c, dummy=0x0) at
>>>> event.c:1738
>>>>      workers_were_busy = 0
>>>>      ep = 0x54d70667c9d88
>>>>      te = 0x0
>>>>      rc = 4
>>>>      tpool = 0x55e62c328eb8 <ap_server_conf>
>>>>      csd = 0x7f8d78006ce0
>>>>      ptrans = 0x7f8d78006c58
>>>>      lr = 0x54d70667c9d83
>>>>      have_idle_worker = 0
>>>>      out_pfd = 0x7f8de0002918
>>>>      num = 0
>>>>      timeout_interval = 140247325214952
>>>>      pt = 0x1
>>>>      closed = 1
>>>> #3  0x00007f8e80b620a4 in start_thread () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #4  0x00007f8e8089762d in clone () from /lib/x86_64-linux-gnu/libc.so.6
>>>> No symbol table info available.
>>>> 
>>>> Thread 1 (Thread 0x7f8e8215a780 (LWP 27400)):
>>>> #0  0x00007f8e80b634db in pthread_join () from
>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>> No symbol table info available.
>>>> #1  0x00007f8e80d9e4ab in apr_thread_join (retval=0x7ffda735e794,
>>>> thd=0x7f8de00dbb48) at threadproc/unix/thread.c:217
>>>>      stat = <optimized out>
>>>>      thread_stat = 0x1
>>>> #2  0x000055e62bfedeb3 in join_workers (listener=0x7f8de00dbb48,
>>>> threads=0x55e62cb2f960) at event.c:2376
>>>>      thread_rv = 21990
>>>> #3  0x000055e62bfee25a in child_main (child_num_arg=5,
>>>> child_bucket=749926752) at event.c:2574
>>>>      threads = 0x55e62cb2f960
>>>>      ts = 0x55e62c844430
>>>>      thread_attr = 0x55e62c844450
>>>>      start_thread_id = 0x55e62c8444b0
>>>> #4  0x000055e62c0b8fe0 in make_child (s=0x7f8d7ef3d9d0, slot=5,
>>>> bucket=0) at event.c:2646
>>>> No locals.
>>>> #5  0x000055e62c0b950c in server_main_loop (num_buckets=<optimized out>,
>>>> remaining_children_to_start=<optimized out>) at event.c:2916
>>>>      ps = 0xfffffffffffffe00
>>>>      status = 0
>>>>      pid = {pid = 21894, in = 0x7f8e80d89d76 <find_entry+134>, out
=
>>>> 0x0, err = 0xc}
>>>>      child_slot = 5
>>>>      exitwhy = APR_PROC_EXIT
>>>>      processed_status = 0
>>>> #6  event_run (_pconf=0x7f8d7ef3d9d0, plog=0x5, s=0xc8) at event.c:3035
>>>>      remaining_children_to_start = 0
>>>> #7  0x000055e62bff642e in ap_run_mpm (pconf=0x55e62c74f138,
>>>> plog=0x55e62c790bb8, s=0x55e62c7805a8) at mpm_common.c:94
>>>>      pHook = <optimized out>
>>>>      n = 0
>>>>      rv = -1
>>>> #8  0x000055e62bfeed15 in main (argc=2, argv=0x7ffda735eb98) at main.c:783
>>>>      c = 68 'D'
>>>>      error = 0xfffffffffffffe00 <error: Cannot access memory at
>>>> address 0xfffffffffffffe00>
>>>>      process = 0x55e62c74d218
>>>>      pconf = 0x55e62c74f138
>>>>      plog = 0x55e62c790bb8
>>>>      ptemp = 0x55e62c7a8d98
>>>>      pcommands = 0x55e62c771248
>>>>      opt = 0x55e62c771338
>>>>      mod = 0x55e62c3235d0 <ap_prelinked_modules+336>
>>>>      opt_arg = 0x7ffda735eef1 "FOREGROUND"
>>>>      signal_server = 0xfffffffffffffe00
>>>> 
>>>> Greets,
>>>> Stefan
>>>> 
>>>> 
>>>> Am 18.04.2017 um 14:47 schrieb Eric Covener:
>>>>> On Tue, Apr 18, 2017 at 8:43 AM, Stefan Priebe - Profihost AG
>>>>> <s.priebe@profihost.ag> wrote:
>>>>>> bt of such a process shows:
>>>>>> (gdb) bt
>>>>>> #0  0x00007f5df74f64db in pthread_join () from
>>>>>> /lib/x86_64-linux-gnu/libpthread.so.0
>>>>> 
>>>>> Need to see the other threads in the process, this one is just waiting
>>>>> for the others to complete.
>>>>> 
>>>>> "thread apply all bt full"
>>>>> 
>>>>> 
>>> 
> 


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