Class Loader Not Reset in Mail Transport

[Rickfdalton]

Description

Hi team,

The below error was observed during the invocation of an API.

ERROR {org.wso2.securevault.secret.SecretCallbackHandlerFactory} - A SecretCallbackHandler cannot be found for class name : org.wso2.securevault.secret.handler.SecretManagerSecretCallbackHandler java.lang.ClassNotFoundException: org.wso2.securevault.secret.handler.SecretManagerSecretCallbackHandler cannot be found by axiom_1.2.11.wso2v25
  at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:512)
  at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:423)
  at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:415)
  at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:155)
  at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:527)
  at org.wso2.securevault.secret.SecretCallbackHandlerFactory.createSecretCallbackHandler(SecretCallbackHandlerFactory.java:62)
  at org.wso2.securevault.SecretResolverFactory.initPasswordManager(SecretResolverFactory.java:289)
  at org.wso2.securevault.SecretResolverFactory.create(SecretResolverFactory.java:166)
  at org.apache.axis2.deployment.AxisConfigBuilder.populateConfig(AxisConfigBuilder.java:93)
  at org.wso2.carbon.core.multitenancy.TenantAxisConfigurator.populateAxisConfiguration(TenantAxisConfigurator.java:468)
  at org.wso2.carbon.core.multitenancy.TenantAxisConfigurator.populateAxisConfig(TenantAxisConfigurator.java:328)
  at org.wso2.carbon.core.multitenancy.TenantAxisConfigurator.getAxisConfiguration(TenantAxisConfigurator.java:273)
  at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContext(ConfigurationContextFactory.java:64)
  at org.wso2.carbon.core.multitenancy.utils.TenantAxisUtils.createTenantConfigurationContext(TenantAxisUtils.java:332)
  at org.wso2.carbon.core.multitenancy.utils.TenantAxisUtils.getTenantConfigurationContext(TenantAxisUtils.java:159)
  at org.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.processRequest(MultitenantMessageReceiver.java:237)
  at org.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.receive(MultitenantMessageReceiver.java:87)
  at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
  at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:399)
  at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:458)
  at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:206)
  at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
  at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
  at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
  at java.base/java.lang.Thread.run(Thread.java:829)

From debugging, we found that the class loader is getting changed during the engagement of mailto transport in API mediation policy.

Regards,
Jathavan

Steps to Reproduce

Steps to Reproduce:
Deploy APIM 4.2.0 with a mediation policy that engages the mail transport.
Trigger the execution of the mediation policy involving the mail transport.

Version

APIM 4.2.0

Environment Details (with versions)

No response