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Posted to issues@trafficserver.apache.org by GitBox <gi...@apache.org> on 2020/11/13 07:22:10 UTC

[GitHub] [trafficserver] masaori335 opened a new issue #7319: 9.0.x SplitDNS is not working 

masaori335 opened a new issue #7319:
URL: https://github.com/apache/trafficserver/issues/7319


   On investigation of #7315, I found that SplitDNS is not working at master & 9.0.x with the same configs which I used for 8.1.x.
   
   Debug log says the splitdns fallback to default dns resolver.
   ```
   [Nov 13 16:18:29.545] [ET_NET 11] DEBUG: <SplitDNS.cc:186 (getDNSRecord)> (splitdns) Called SplitDNS::getDNSRecord(example.com)
   [Nov 13 16:18:29.545] [ET_NET 11] DEBUG: <SplitDNS.cc:200 (getDNSRecord)> (splitdns) Fail to match a valid splitdns rule, fallback to default dns resolver
   ```
   
   It looks like `SplitDNS::findServer()` always returns `DNS_SRVR_UNDEFINED`.


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[GitHub] [trafficserver] masaori335 closed issue #7319: 9.0.x SplitDNS is not working

Posted by GitBox <gi...@apache.org>.
masaori335 closed issue #7319:
URL: https://github.com/apache/trafficserver/issues/7319


   


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[GitHub] [trafficserver] masaori335 commented on issue #7319: 9.0.x SplitDNS is not working

Posted by GitBox <gi...@apache.org>.
masaori335 commented on issue #7319:
URL: https://github.com/apache/trafficserver/issues/7319#issuecomment-726571711


   The removing TCL dependency change from `HostLookup` looks root cause.
   https://github.com/apache/trafficserver/commit/a7d06b85e5253ac118dda36bef11311d8d9c1ffe


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[GitHub] [trafficserver] masaori335 commented on issue #7319: 9.0.x SplitDNS is not working

Posted by GitBox <gi...@apache.org>.
masaori335 commented on issue #7319:
URL: https://github.com/apache/trafficserver/issues/7319#issuecomment-726579610


   With #7320 fix, the assertion of mutex in `Continuation::handleEvent()` is failed. Which is the same symptom as #7315 (crash on 8.1.x). Please note that the 8.1.x doesn't have the assertion.
   ```
   (lldb) bt
   * thread #2, name = '[ET_NET 0]', stop reason = signal SIGABRT
     * frame #0: 0x00007fff6e38633a libsystem_kernel.dylib`__pthread_kill + 10
       frame #1: 0x00007fff6e442e60 libsystem_pthread.dylib`pthread_kill + 430
       frame #2: 0x00007fff6e30d808 libsystem_c.dylib`abort + 120
       frame #3: 0x000000000006a04e libtscore.10.dylib`ink_abort(message_format="%s:%d: failed assertion `%s`") at ink_error.cc:99:3
       frame #4: 0x000000000006716c libtscore.10.dylib`::_ink_assert(expression="!mutex || mutex->thread_holding == this_ethread()", file="/Users/masaori/src/github.com/apache/trafficserver-asf-master/iocore/eventsystem/I_Continuation.h", line=218) at ink_assert.cc:37:3
       frame #5: 0x0000000100004f5c traffic_server`Continuation::handleEvent(this=0x000000000702f000, event=0, data=0x0000000000000000) at I_Continuation.h:218:5
       frame #6: 0x0000000100294914 traffic_server`DNSConnection::trigger(this=0x0000000007043c20) at DNSConnection.cc:88:12
       frame #7: 0x00000001003bd1fb traffic_server`NetHandler::waitForActivity(this=0x0000000003ec7080, timeout=39995000) at UnixNet.cc:534:27
       frame #8: 0x00000001003fe701 traffic_server`EThread::execute_regular(this=0x0000000003ec3000) at UnixEThread.cc:303:14
       frame #9: 0x00000001003feb7d traffic_server`EThread::execute(this=0x0000000003ec3000) at UnixEThread.cc:364:11
       frame #10: 0x00000001003fcd3b traffic_server`spawn_thread_internal(a=0x0000000000d17200) at Thread.cc:92:12
       frame #11: 0x00007fff6e443109 libsystem_pthread.dylib`_pthread_start + 148
       frame #12: 0x00007fff6e43eb8b libsystem_pthread.dylib`thread_start + 15
   ```


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