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Identifying Slow WebSphere Startups or Admin Functions relating to INET6 Hostname Lookup
If you are experiencing a very Slow WebSphere Application Server Startup and/or possibly WSAdmin command executions or Administrative Console operations are taking a very long time to complete, regardless of what product version you are currently running, the issue could be IP Address lookup and Hostname resolution related. This is contingent upon finding supporting evidence of relevant java/net/Inet6AddressImpl.getLocalHostName(Native Method) involvement in the associated Java cores, Thread dumps or System logs for the java process in... [More]
Tags: websphere performance ibm-blog wasadm-blog inet6 application_server websphere_application_ser... was hostname dns lookup websphere_nd wassdk-blog |
A better, stronger and faster WebSphere MQ on z/OS
WebSphere MQ implements more enhancements and improvements with each new version that is released. While major changes receive a lot of fanfare through topics in the IBM Knowledge Center, there are often many behind-the-scenes updates that aren't as major, but still greatly enhance MQ. Sometimes the code is just tightened up a bit or (for MQ on z/OS) service parameters are implemented to help mitigate undesired behavior. Here, we will take a look at some of these changes, code enforcements, and service parameters that Level 2 cites... [More]
Tags: chin protocol wmq dns tips channels queue mq zos alias |
WebSphere MQ Channels waiting on Domain Name Server
We see the problem mentioned in the title "WebSphere MQ Channels waiting on Domain Name Server" quite often in Websphere MQ Level 2 Support. It manifests itself in a variety of ways: You notice that channels are very slow to start or end. Sometimes you will see the message, CSQX014E, meaning that there are more channels trying to start than you have defined with MAXCHL. You may see many CSQX500I messages. If you display channel status, DISPLAY CHSTATUS, you see channels in STATE(BINDING) and SUBSTATE(NAMESEVER). If you do multiple... [More]
Tags: dns channels websphere mq wmq |
FileOutput Node - Java DNS caching pitfall - quick clarification and tips
I was remodeling our kitchen and, as always, one thing led to another. I built drawers to replace some cabinets, converted some false drawers to real drawers, repaired shoddy electrical work, installed a cooktop, changed the gas lines, reconfigured a downdraft, fixed the plantation shutters, and so on. When it came time to spray the kitchen, I was up to my ears in tools. So, my wife helped me by putting the tools up. I haven't been able to find them since. Luckily, the FileOutput node's behavior is more predictable when there's a failure. ... [More]
Tags: file_output dns caching message ip cache resolution wmb file_output_node broker websphere |
