OSMH: On-Prem Leapp Upgrade to OL9, mgmt_agent Fails to Start After Upgrade

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Applies To:

Oracle Cloud Infrastructure
OS Management Hub (OSMH)

Symptoms:

After using leapp to upgrade to Oracle Linux 9, the mgmt_agent.service fails to start. The log /opt/oracle/mgmt_agent/agent_inst/log/mgmt_agent_errors.log shows the following error:

2025-05-08 10:01:17,248 [WrapperSimpleAppMain-20] ERROR - Critical error:
java.lang.NoClassDefFoundError: com/sun/net/ssl/internal/ssl/Provider
        at oracle.polaris.sdk.common.agent.crypt.AgentCryptoUtility.initialize(AgentCryptoUtility.java:220) ~[agent-sdk-1.0.3811.jar:?]
        at oracle.polaris.core.tmmain.TMMain.startup(TMMain.java:216) ~[agent-core-1.0.3811.jar:?]
        at oracle.polaris.core.tmmain.TMMain.agentMain(TMMain.java:578) [agent-core-1.0.3811.jar:?]
        at oracle.polaris.core.tmmain.Polaris.main(Polaris.java:109) [agent-core-1.0.3811.jar:?]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
        at java.base/java.lang.reflect.Method.invoke(Method.java:569) ~[?:?]
        at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:349) [wrapper.jar:3.5.41]