Bug #77174 [NEW]: SNMP poll stale when new snmp poll is initiated

From: ognyan dot dimitrov at deltatel dot ro Operating system: Windows Version 10.0.17134 Build PHP version: 7.1.24 Package: SNMP related Bug Type: Bug Bug description:SNMP poll stale when new snmp poll is initiated Description: ------------ PHP Version => 7.1.1 System => Windows NT DESKTOP-PJ7K6O7 10.0 build 17134 (Windows 10) i586 Build Date => Jan 18 2017 18:37:40 Compiler => MSVC14 (Visual C++ 2015) Architecture => x86 Configure Command => cscript /nologo configure.js "--enable-snapshot-build" "--enable-debug-pack" "--with-pdo-oci=c:\php-sdk\oracle\x86\instantclient_12_1\sdk,shared" "--with-oci8-12c=c:\php-sdk\oracle\x86\instantclient_12_1\sdk,shared" "--enable-object-out-dir=../obj/" "--enable-com-dotnet=shared" "--with-mcrypt=static" "--without-analyzer" "--with-pgo" Server API => Command Line Interface Virtual Directory Support => enabled Configuration File (php.ini) Path => C:\WINDOWS Loaded Configuration File => D:\xampp-web\php\php.ini Scan this dir for additional .ini files => (none) Additional .ini files parsed => (none) PHP API => 20160303 PHP Extension => 20160303 Zend Extension => 320160303 Zend Extension Build => API320160303,TS,VC14 PHP Extension Build => API20160303,TS,VC14 Debug Build => no Thread Safety => enabled Zend Signal Handling => disabled Zend Memory Manager => enabled Zend Multibyte Support => provided by mbstring IPv6 Support => enabled DTrace Support => disabled Core PHP Version => 7.1.1 snmp NET-SNMP Support => enabled NET-SNMP Version => 5.7.2 PHP SNMP Version => 0.1 D:\xampp-web\apache\bin λ httpd.exe -v Server version: Apache/2.4.25 (Win32) Server built: Dec 17 2016 10:42:52 Test script: --------------- $this->snmpSession = new \SNMP(\SNMP::VERSION_2c, $this->ip, $this->community, 4000000, 5); $rawPortCounters['ifInErrors'] = $this->snmpSession->walk("1.3.6.1.2.1.2.2.1.14", true); ... Expected result: ---------------- When a web request is initiating php code for snmp pooling specific device it shall be possible another request from the same or other browser to trigger pooling of same or different node without interrupting the first one. No timeout is helping. neither snmp_timeout in class instantiation, nor max_execution_time in php.ini, even TimeOut in apache server directive is not killing the request. Actual result: -------------- When a pooling to Device A in moment X is initiated via web request if a pooling to device B in X+1 is initiated the poll in moment X will stale, take memory which will in one moment crash php since staled requests will never be completed. Also redis session stale (used for snmp results pooling). I've tried upgrading to PHP 7.2.11 (cli) (built: Oct 10 2018 02:39:52) ( ZTS MSVC15 (Visual C++ 2017) x86 ) but the behaviour is the same -- Edit bug report at https://bugs.php.net/bug.php?id=77174&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77174&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77174&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77174&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77174&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77174&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77174&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77174&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77174&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77174&r=support Expected behavior: https://bugs.php.net/fix.php?id=77174&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77174&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77174&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77174&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77174&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77174&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77174&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77174&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77174&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77174&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77174&r=mysqlcfg