[mod_cluster-issues] [JBoss JIRA] (MODCLUSTER-526) SIGSEGV in remove_workers_node (mod_proxy_cluster.so) when using LoadBalancingGroup
Michal Karm Babacek (JIRA)
issues at jboss.org
Wed Jul 20 10:38:00 EDT 2016
[ https://issues.jboss.org/browse/MODCLUSTER-526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michal Karm Babacek updated MODCLUSTER-526:
-------------------------------------------
Description:
* 3 tomcats
* 2 load balancing groups
* 1 request every 3 seconds (no load at all)
* shutdown and kill of various nodes
* no later than third kill/start iteration causes SIGSEGV
{code}
#if AP_MODULE_MAGIC_AT_LEAST(20101223,1)
/* Here that is tricky the worker needs shared memory but we don't and CONFIG will reset it */
helper->index = 0; /* mark it removed */
worker->s = helper->shared;
crash---> memcpy(worker->s, stat, sizeof(proxy_worker_shared));
#else
worker->id = 0; /* mark it removed */
#endif
{code}
was:
* 3 tomcats
* 2 load balancing groups
* 1 request every 3 seconds (no load at all)
* shutdown and kill of various nodes
* no later than third kill/start iteration causes SIGSEGV
{code}
h==9005== Thread 5:
==9005== Source and destination overlap in memcpy(0x4021068, 0x4021068, 304)
==9005== at 0x4C2B403: memcpy@@GLIBC_2.14 (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==9005== by 0xB28ECA1: insert_update (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0xB07BCC2: ap_slotmem_do (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_cluster_slotmem.so)
==9005== by 0xB28ED6B: insert_update_node (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0xB28666D: process_node_cmd (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0xB286AA7: process_appl_cmd (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0xB28745A: process_remove (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0xB28B619: manager_handler (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_manager.so)
==9005== by 0x44CEEF: ap_run_handler (config.c:170)
==9005== by 0x44D438: ap_invoke_handler (config.c:434)
==9005== by 0x461D89: ap_process_async_request (http_request.c:410)
==9005== by 0x45E4AF: ap_process_http_connection (http_core.c:154)
==9005==
==9005== Thread 3:
==9005== Invalid write of size 8
==9005== at 0x4C2B473: memcpy@@GLIBC_2.14 (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==9005== by 0xB499EE5: remove_workers_node (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_proxy_cluster.so)
==9005== by 0xB49E165: remove_workers_nodes (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_proxy_cluster.so)
==9005== by 0xB49E353: proxy_cluster_watchdog_func (in /home/karm/Projects/MOD_CLUSTER/httpd-2.4.20-build/modules/mod_proxy_cluster.so)
==9005== by 0x5B5FEE4: start_thread (pthread_create.c:309)
==9005== by 0x606DD1C: clone (clone.S:111)
==9005== Address 0x0 is not stack'd, malloc'd or (recently) free'd
{code}
> SIGSEGV in remove_workers_node (mod_proxy_cluster.so) when using LoadBalancingGroup
> -----------------------------------------------------------------------------------
>
> Key: MODCLUSTER-526
> URL: https://issues.jboss.org/browse/MODCLUSTER-526
> Project: mod_cluster
> Issue Type: Bug
> Components: Native (httpd modules)
> Affects Versions: 1.3.3.Final
> Environment: Fedora 20, x86_64, httpd 2.4.20
> Reporter: Michal Karm Babacek
> Assignee: Michal Karm Babacek
> Priority: Blocker
> Fix For: 1.3.4.Final
>
>
> * 3 tomcats
> * 2 load balancing groups
> * 1 request every 3 seconds (no load at all)
> * shutdown and kill of various nodes
> * no later than third kill/start iteration causes SIGSEGV
> {code}
> #if AP_MODULE_MAGIC_AT_LEAST(20101223,1)
> /* Here that is tricky the worker needs shared memory but we don't and CONFIG will reset it */
> helper->index = 0; /* mark it removed */
> worker->s = helper->shared;
> crash---> memcpy(worker->s, stat, sizeof(proxy_worker_shared));
> #else
> worker->id = 0; /* mark it removed */
> #endif
> {code}
--
This message was sent by Atlassian JIRA
(v6.4.11#64026)
More information about the mod_cluster-issues
mailing list