java.net.UnknownHostException

[Devender210590]

Hi,

I am facing below issue while triggering PR from Bitbucket(Atlassian Bitbucket v5.16.11) toward jenkins:

Pull Request Notifier Version: 3.24

2020-07-20 06:05:31,867 ERROR [threadpool:thread-2] <UserID>*1O9CA51x365x10064721x0 bqys8e 100.126.0.0 "POST /<Project Repo in BitBucket>
java.net.UnknownHostException: <jenkinsServerName>: Try again                                                                                                                
        at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)                                                                                                                
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)                                                                                                            
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)                                                                                                   
        at java.net.InetAddress.getAllByName0(InetAddress.java:1277)                                                                                                                 
        at java.net.InetAddress.getAllByName(InetAddress.java:1193)                                                                                                                  
        at java.net.InetAddress.getAllByName(InetAddress.java:1127)                                                                                                                  
        at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)                                                                              
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:112)                                                       
        at org.apache.http.impl.conn.BasicHttpClientConnectionManager.connect(BasicHttpClientConnectionManager.java:325)                                                             
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)                                                                                     
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)                                                                                            
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)                                                                                                
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)                                                                                                       
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)                                                                                                
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)                                                                                     
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)                                                                                      
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)                                                                                     
        at se.bjurr.prnfb.http.UrlInvoker.doInvoke(UrlInvoker.java:376)                                                                                                              
        at se.bjurr.prnfb.http.UrlInvoker.invoke(UrlInvoker.java:182)                                                                                                                
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener$1.invoke(PrnfbPullRequestEventListener.java:100)                                                                    
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener.notify(PrnfbPullRequestEventListener.java:324)                                                                      
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener.handleEventNotification(PrnfbPullRequestEventListener.java:163)                                                     
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener.handleEvent(PrnfbPullRequestEventListener.java:134)                                                                 
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener.access$000(PrnfbPullRequestEventListener.java:60)                                                                   
        at se.bjurr.prnfb.listener.PrnfbPullRequestEventListener$2.run(PrnfbPullRequestEventListener.java:178)                                                                       
        at com.atlassian.stash.internal.concurrent.DefaultTransferableStateManager$StateTransferringRunnable.run(DefaultTransferableStateManager.java:166)                          
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)                                                                                                  
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)                                                                                                                  
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)                                                     
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)                                                            
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)                                                                                           
        at java.lang.Thread.run(Thread.java:748)                                                                                                                                     
        ... 1 frame trimmed

The issue seems to be intermittent and coming for specific set of users. Kindly Help.

Thanks,
Dev