Multiple invalid nodes created on graceful httpd restart -------------------------------------------------------- Key: MODCLUSTER-570 URL: https://issues.jboss.org/browse/MODCLUSTER-570 Project: mod_cluster Issue Type: Bug Components: Native (httpd modules) Affects Versions: 1.3.5.Final, 1.3.6.Final Environment: httpd 2.4.25 Alpine Linux 3.5 Reporter: Antoine Cotten Assignee: Jean-Frederic Clere Priority: Minor Attachments: mod_cluster_after_graceful.png, mod_cluster_before_graceful.png mod_cluster creates a bunch of invalid nodes after a graceful restart of Apache httpd ({{SIGUSR1}}, {{SIGWINCH}}). The issue happens with or without backend servers in the pool. httpd logs: {code} [mpm_event:notice] [pid 1:tid 140313388616520] AH00493: SIGUSR1 received. Doing graceful restart [:notice] [pid 1:tid 140313388616520] Advertise initialized for process 1 [mpm_event:notice] [pid 1:tid 140313388616520] AH00489: Apache/2.4.25 (Unix) mod_cluster/1.3.5.Final configured -- resuming normal operations [core:notice] [pid 1:tid 140313388616520] AH00094: Command line: 'httpd -D FOREGROUND' [:notice] [pid 116:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL [:notice] [pid 116:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL [:notice] [pid 116:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL # ... trimmed 48 lines ... [:notice] [pid 145:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL [:notice] [pid 145:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL [:notice] [pid 145:tid 140313388616520] Created: worker for ://: failed: Unable to parse URL [:notice] [pid 145:tid 140313388616520] Created: worker for ://:\x9d\x7f failed: Unable to parse URL [:notice] [pid 145:tid 140313388616520] add_balancer_node: balancer safe-name (balancer://4:6666\r\nX-Manager-Url: /c8dae916-7642-4deb-b841-2f3435613749\r\nX-Manager-Protocol: http\r\nX-Manager-Host: 172.17.0.4\r\n\r\n) too long {code} Application server logs (tomcat8): {code} Feb 01, 2017 11:34:25 AM org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler sendRequest ERROR: MODCLUSTER000042: Error MEM sending STATUS command to 172.17.0.4/172.17.0.4:6666, configuration will be reset: MEM: Can't read node with "java1-depl1-1234" JVMRoute Feb 01, 2017 11:34:35 AM org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren SEVERE: Exception invoking periodic operation: java.lang.IllegalArgumentException: Node: [1],Name: ,Balancer: ,LBGroup: ,Host: ,Port: ,Type: ,Flushpackets: Off,Flushwait: 0,Ping: 0,Smax: 0,Ttl: 0,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 0 Node: [2],Name: ,Balancer: ,LBGroup: ,Host: ,Port: ,Type: ,Flushpackets: Off,Flushwait: 0,Ping: 0,Smax: 0,Ttl: 0,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 0 Node: [3],Name: ,Balancer: ,LBGroup: ,Host: ,Port: ,Type: ,Flushpackets: Off,Flushwait: 0,Ping: 0,Smax: 0,Ttl: 0,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 0 # ... trimmed lines ... Node: [18],Name: ,Balancer: ,LBGroup: ,Host: ,Port: ,Type: ,Flushpackets: Off,Flushwait: 0,Ping: 0,Smax: 0,Ttl: 0,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 0 Node: [19],Name: ,Balancer: ,LBGroup: ,Host: ,Port: ,Type: ,Flushpackets: Off,Flushwait: 0,Ping: 0,Smax: 0,Ttl: 0,Elected: 0,Read: 0,Transfered: 0,Connected: 0,Load: 0 Vhost: [0:0:1], Alias: Vhost: [0:0:2], Alias: Vhost: [0:0:3], Alias: # ... trimmed lines ... Vhost: [0:0:19], Alias: Vhost: [0:0:20], Alias: Context: [0:0:1], Context: , Status: REMOVED Context: [0:0:2], Context: , Status: REMOVED Context: [0:0:3], Context: , Status: REMOVED # ... trimmed lines ... Context: [0:0:97], Context: , Status: REMOVED Context: [0:0:98], Context: , Status: REMOVED Context: [0:0:99], Context: , Status: REMOVED Context: [0:0:1], Context: , Status: REMOVED at org.jboss.modcluster.mcmp.impl.DefaultMCMPResponseParser.parseInfoResponse(DefaultMCMPResponseParser.java:96) at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:396) at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:365) at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:457) at org.jboss.modcluster.container.catalina.CatalinaEventHandlerAdapter.lifecycleEvent(CatalinaEventHandlerAdapter.java:252) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1374) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1546) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1524) at java.lang.Thread.run(Thread.java:745) Feb 01, 2017 11:35:05 AM org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler sendRequest {code}