java.lang.NullPointerException in Mid Server Logs

[ersureshbe]

Hi Team,

Recently, i facing below error from Mid Server Logs. Can you please help me know how to resolve it?

java.lang.NullPointerException

at java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1106)

at java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1097)

at org.cometd.common.AbstractClientSession.unregisterSubscriber(AbstractClientSession.java:291)

at org.cometd.common.AbstractClientSession.receive(AbstractClientSession.java:215)

at org.cometd.client.BayeuxClient.failMessage(BayeuxClient.java:990)

at org.cometd.client.BayeuxClient.failMessages(BayeuxClient.java:965)

at org.cometd.client.BayeuxClient.terminate(BayeuxClient.java:894)

at org.cometd.client.BayeuxClient$DisconnectedState.execute(BayeuxClient.java:1507)

at org.cometd.client.BayeuxClient.updateBayeuxClientState(BayeuxClient.java:1082)

at org.cometd.client.BayeuxClient.disconnect(BayeuxClient.java:520)

at org.cometd.client.BayeuxClient.disconnect(BayeuxClient.java:515)

at org.cometd.client.BayeuxClient.disconnect(BayeuxClient.java:567)

at com.snc.glide.amb.AMBClient.disconnectBayeux(AMBClient.java:177)

at com.snc.glide.amb.AMBClient.disconnect(AMBClient.java:149)

at com.service_now.mid.amb.AMBClientProvider.disconnect(AMBClientProvider.java:149)

at com.service_now.mid.amb.AMBClientProvider.connect(AMBClientProvider.java:134)

at com.service_now.mid.amb.AMBClientProvider.executeInLock(AMBClientProvider.java:165)

at com.service_now.mid.amb.AMBClientProvider.lambda$initialize$15(AMBClientProvider.java:48)

at java.lang.Thread.run(Thread.java:745)

[leochavez]

Hi Kiran,

This is a bit off from the original topic, but I figured I'd answer.....

When a MID Server is installed, it installs/upgrades JRE version 1.8 (may have changed).

As for upgrades, MID Servers are typically setup to automatically upgrade themselves.   They do this by verifying their version against the version of the instance they communicate with.   In some instances, upgrades can also be performed manually.

The following has more information:

MID Server upgrades

Hope that helps,

- Leo