What is ConcurrentModificationException? According to Oracle(TM) Java doc it is thrown when an object is modified but the operation should not be allowed at that time. I faced this issue when my application is built and ran using Java8. The same application was working fine with out any issue if I… Continue Reading Collections.sort changes in Java8

If you are using Wildfly 10.1 for your load test your REST application, you should have definitely got into to Wildfly hanging issue with in 30 minutes of run. This is a known issue with XNIO and issue is tracked as part of WFLY-7275. The hanged thread dump will have… Continue Reading Wildfly hanging in 30 minutes of load test

If your organization is using JBOSS then you must be using them configured with https rather than http. During development did you check what are the different protocol (and ciphers) that your JBOSS version supports. This blog will list those for few popular JBOSS versions. The results were obtained using… Continue Reading JBOSS – SSL Version and Cipher list

In one of my project, we used to keep commands inside an text file. We will be getting new files every day/week/month and the frequency of getting such file is unpredictable. Every file that our file server receives will be named like file.1,file.2…file.110,file.111,file.112, etc. We bundle all these files on… Continue Reading Linux find files using filename pattern and cat its content

Off late, there was an application which failed with following error at run time when we ran the application in Wildfly. This class is available inside java run time library. In order to include these sun internal classes into the application path I added below XML block into jboss-deployment-structure.xml, To… Continue Reading Wildfly NoClassDefFoundError on com.sun.xml.internal.stream.util.ThreadLocalBufferAllocator

If you are using source code control system such as perforce then I’m sure you might have had plenty of situation to find the difference between a depot using label. During these times, if you run command like below to get the difference, you might have seen perforce printing lot… Continue Reading How to take perforce diff with out identical files

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