Hi All,
We recently experienced a bunch of assertion failures with the Lua plugin on
ATS 7.1.4. When the transaction is being killed, the Lua plugin calls
ts_lua_destroy_http_ctx() which calls TSHandleMLocRelease() with
http_ctx->server_request_bufp as the buffer argument. The assertion failure is -
Fatal: InkAPI.cc:1917: failed assertion `sdk_sanity_check_mbuffer(bufp) ==
TS_SUCCESS`
Is it possible that the data structure for the server request is changed within
the life-time of the transaction making the pointer invalid? I noticed that
this was possible
for client responses addressed in 7236e excerpt -
+ // client response can be changed within a transaction
+ // (e.g. due to the follow redirect feature). So, clearing the pointers
+ // to allow API(s) to fetch the pointers again when it re-enters the hook
+ if (http_ctx->client_response_hdrp != NULL) {
+ TSHandleMLocRelease(http_ctx->client_response_bufp, TS_NULL_MLOC,
http_ctx->client_response_hdrp);
+ http_ctx->client_response_bufp = NULL;
+ http_ctx->client_response_hdrp = NULL;
+ }
Is something similar possible with the server request which uses the same kind
of null pointer check around the setting of the bufp and hdrp pointers?
Back-trace -
(gdb) bt
#0 0x00002b94af14f377 in raise () from /lib64/libc.so.6
#1 0x00002b94af150ba8 in abort () from /lib64/libc.so.6
#2 0x00002b94ac7bdeeb in ink_abort
(message_format=message_format@entry=0x2b94ac7ca767 "%s:%d: failed assertion
`%s`")
at ink_error.cc:99
#3 0x00002b94ac7bbf75 in _ink_assert (expression=<optimized out>,
file=<optimized out>, line=<optimized out>)
at ink_assert.cc:37
#4 0x00000000004c827a in TSHandleMLocRelease ()
#5 0x00002b94b3c51f08 in ts_lua_destroy_http_ctx (http_ctx=0x2b94e7d85a20) at
experimental/ts_lua/ts_lua_util.c:464
#6 0x00002b94b3c5271a in ts_lua_http_cont_handler (contp=<optimized out>,
ev=TS_EVENT_HTTP_TXN_CLOSE, edata=0x2b94b4d39340)
at experimental/ts_lua/ts_lua_util.c:791
#7 0x00000000004c5fde in INKContInternal::handle_event(int, void*) ()
#8 0x0000000000589ce4 in HttpSM::state_api_callout(int, void*) ()
#9 0x0000000000590a7d in HttpSM::kill_this() ()
#10 0x00000000005916d8 in HttpSM::main_handler(int, void*) ()
#11 0x000000000072f103 in UnixNetVConnection::mainEvent(int, Event*) ()
#12 0x0000000000726459 in InactivityCop::check_inactivity(int, Event*) ()
#13 0x0000000000755040 in EThread::process_event(Event*, int) ()
#14 0x0000000000755da1 in EThread::execute_regular() ()
#15 0x0000000000754a9a in spawn_thread_internal(void*) ()
#16 0x00002b94ae4e1ea5 in start_thread () from /lib64/libpthread.so.0
#17 0x00002b94af2178cd in clone () from /lib64/libc.so.6
Thanks,
Peter
