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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-11295

Only main process unloads modules

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    • Icon: Incident report Incident report
    • Resolution: Unresolved
    • Icon: Trivial Trivial
    • None
    • 2.2.16rc1, 3.0.6rc1, 3.2.2rc1, 3.4.0alpha1
    • Agent (G), Proxy (P), Server (S)
    • UNIX

      Many thanks to syepes for discovering this one!

      Start and stop Zabbix with at least one module to load, DebugLevel=4 and such modification of SIGTERM handler:

      Index: src/libs/zbxnix/sighandler.c
===================================================================
--- src/libs/zbxnix/sighandler.c	(revision 62867)
+++ src/libs/zbxnix/sighandler.c	(working copy)
@@ -83,7 +83,7 @@
 		zabbix_log(sig_parent_pid == SIG_CHECKED_FIELD(siginfo, si_pid) || SIGINT == sig ?
 				LOG_LEVEL_DEBUG : LOG_LEVEL_WARNING,
 				"Got signal [signal:%d(%s),sender_pid:%d,sender_uid:%d,"
-				"reason:%d]. %s ...",
+				"reason:%d]. %s ... without unloading modules",
 				sig, get_signal_name(sig),
 				SIG_CHECKED_FIELD(siginfo, si_pid),
 				SIG_CHECKED_FIELD(siginfo, si_uid),

      Observe the log file:

        8751:20160930:125402.105 server #0 started [main process]
...
  8751:20160930:125410.301 Got signal [signal:15(SIGTERM),sender_pid:7446,sender_uid:1000,reason:0]. Exiting ...
  8751:20160930:125410.301 zbx_on_exit() called
  8756:20160930:125410.301 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8769:20160930:125410.301 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8780:20160930:125410.301 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8757:20160930:125410.302 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8765:20160930:125410.302 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8766:20160930:125410.303 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8781:20160930:125410.303 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8768:20160930:125410.304 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8786:20160930:125410.305 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8771:20160930:125410.305 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8773:20160930:125410.306 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8774:20160930:125410.306 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8775:20160930:125410.307 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8776:20160930:125410.307 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8777:20160930:125410.308 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8778:20160930:125410.308 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8779:20160930:125410.308 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8782:20160930:125410.308 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8784:20160930:125410.309 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8785:20160930:125410.309 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8764:20160930:125410.309 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8762:20160930:125410.310 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8758:20160930:125410.310 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8761:20160930:125410.311 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8783:20160930:125410.311 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8763:20160930:125410.312 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
  8787:20160930:125410.312 Got signal [signal:15(SIGTERM),sender_pid:8751,sender_uid:1000,reason:0]. Exiting ... without unloading modules
...
  8751:20160930:125412.317 In zbx_unload_modules()
  8751:20160930:125412.317 End of zbx_unload_modules()
  8751:20160930:125412.317 Zabbix Server stopped. Zabbix 3.3.0 (revision {ZABBIX_REVISION}).

      Probably zbx_on_exit() is not the right place for zbx_unload_modules(), it should be called by every Zabbix process.

      Marked as critical because now modules can export historical data and not calling zbx_module_uninit() for every history syncer process can lead to data loss if module does its own data buffering.

            Unassigned Unassigned
            glebs.ivanovskis Glebs Ivanovskis (Inactive)
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              Created:
              Updated: