Error observed after Jira Upgrade

[최재웅]

Hi 
I recently upgraded Jira to version 10.3.22 Ever since the upgrade, 
I've been getting errors since I started Jira. So far, there have been no problems using Jira. Can someone please tell me why this error occurs and how to fix it? If I keep leaving this error, will it cause problems for my Jira? For reference, Jira's node operates in two.

Error Message is

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2026-06-29 12:10:21,969+0900 localq-reader-12 WARN      [c.a.j.c.distribution.localq.LocalQCacheOpReader] [LOCALQ] [VIA-COPY] Runtime exception: UnrecoverableFailure occurred when processing: LocalQCacheOp{cacheName='com.atlassian.jira.crowd.embedded.ofbiz.EagerOfBizUserCache.userCache', action=PUT, key={10300,{JIRA_USERS}}, value == null ? false, replicatePutsViaCopy=true, creationTimeInMillis=1782702621959} from cache replication queue: [queueId=queue_Node2_1_f5f366263dcc357e2720042f33286f8f_put, queuePath={JIRA_HOME}/queue_Node2_1_f5f366263dcc357e2720042f33286f8f_put], failuresCount: 1/1, error: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 

    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 

    java.lang.ClassNotFoundException: net.sf.ehcache.Element not found by com.atlassian.jira.plugins.jira-optimizer-plugin [107] (no security manager: RMI class loader disabled)

2026-06-29 12:10:21,969+0900 localq-reader-12 ERROR      [c.a.j.c.distribution.localq.LocalQCacheOpReader] [LOCALQ] [VIA-COPY] Abandoning sending: LocalQCacheOp{cacheName='com.atlassian.jira.crowd.embedded.ofbiz.EagerOfBizUserCache.userCache', action=PUT, key={10300,{JIRA_USERS}}, value == null ? false, replicatePutsViaCopy=true, creationTimeInMillis=1782702621959} from cache replication queue: [queueId=queue_Node2_1_f5f366263dcc357e2720042f33286f8f_put, queuePath={JIRA_HOME}/queue_Node2_1_f5f366263dcc357e2720042f33286f8f_put], failuresCount: 1/1. Removing from queue. Error: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 

    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 

    java.lang.ClassNotFoundException: net.sf.ehcache.Element not found by com.atlassian.jira.plugins.jira-optimizer-plugin [107] (no security manager: RMI class loader disabled)

com.atlassian.jira.cluster.distribution.localq.LocalQCacheOpSender$UnrecoverableFailure: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 

java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 

java.lang.ClassNotFoundException: net.sf.ehcache.Element not found by com.atlassian.jira.plugins.jira-optimizer-plugin [107] (no security manager: RMI class loader disabled)

at com.atlassian.jira.cluster.distribution.localq.rmi.LocalQCacheOpRMISender.send(LocalQCacheOpRMISender.java:90)

at com.atlassian.jira.cluster.distribution.localq.LocalQCacheOpReader.run(LocalQCacheOpReader.java:109)

at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)

at java.base/java.util.concurrent.FutureTask.run(Unknown Source)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)

at java.base/java.lang.Thread.run(Thread.java:842)

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[Marc -Devoteam-]

Hi @최재웅 

Welcome to the community.

Try to:

• Disable the app flagged in the logs.
• Restart the node without the app.
• Re-enable the app
• Restart the node with the app

[최재웅]

Is the order you want to say the following? If the order below is different, please tell me what you think.

1. Disable 'com.atlassian.jira.plugins.jira-optimizer-plugin' Plugin
2. Node1 Stop
3. Node1 start
4. 'com.atlassian.jira.plugins.jira-optimizer-plugin' Plugin Enable
5. Node2 Stop
6. Node2 Start

[Marc -Devoteam-]

Hi @최재웅 

Stop the app on the node with the error, then stop this node and start the node without the app causing the problem.

If there're are no message in the log enable the app and then restart the node, that had the issue.

[최재웅]

Hi,

I'm using Jira according to node2 and I'm seeing this error on all nodes.

That's why I asked that.

[Marc -Devoteam-]

Hi @최재웅 

Then apply it for all nodes.

Fist bring them all down and only start one noed, is there error there then?