I'm getting below error in one part of my application where it tries to save/create/update data in the database. The application works fine for some time lets say close to 1-2 hours after deployment but starts giving this error on update calls after some time. I'm using JPA EclipseLink implementation.
Note: The update call is being done asynchronously using completable future. The call looks something like this :
CompletableFuture.supplyAsync(() -> {
if (someBean != null) {
try {
someReturnVal = methodCall();
} catch (Exception e) {
log.info("Log with reason: "
+ e.getMessage());
}
}
return someReturnVal;
}).thenAccept(someReturnVal -> {
try {
SomeBean.saveToDB(someReturnVal);
} catch (AccessException e) {
log.info("log with reason: " + e.getMessage());
}
});
SaveToDB looks like:
@Transactional
public void SaveToDB(SomeBean arg1) {
try {
em.persist(arg1);
em.flush();
}Catch{
....
}
Error message in stack trace:
java.lang.IllegalArgumentException: Unable to create EvictionPolicy instance of type org.apache.commons.pool2.impl.DefaultEvictionPolicy
at org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(BaseGenericObjectPool.java:607)
at org.apache.commons.pool2.impl.GenericKeyedObjectPool.setConfig(GenericKeyedObjectPool.java:257)
at org.apache.commons.pool2.impl.GenericKeyedObjectPool.<init>(GenericKeyedObjectPool.java:111)
at com.**.cloud.runtime.kotyo.persistence.client.pool.GenericKeyedObjectPoolAdapter.<init>(GenericKeyedObjectPoolAdapter.java:25)
at com.**.cloud.runtime.kotyo.persistence.client.pool.managed.PoolableManagedConnectionFactoryAdapter.makeObject(PoolableManagedConnectionFactoryAdapter.java:86)
at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:861)
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)...
...
Caused by: java.lang.ClassNotFoundException: org/apache/commons/pool2/impl/DefaultEvictionPolicy
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forNameFW(Class.java:362)
at java.lang.Class.forName(Class.java:355)
at org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(BaseGenericObjectPool.java:598)
... 77 common frames omitted
I'm clueless what is happening wrong here. Can someone please help me here.
I was able to resolve this issue by creating my own ThreadPoolExecutor using Executors, as below:
ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
I then passed this executor to my CompletableFuture call:
CompletableFuture.supplyAsync(() -> { ....
return someReturnVal;
}, executor).thenAccept(someReturnVal -> {
....
});
this solved my problem. The issue seems to be when new CompletableFuture is asynchronously completed by a task running in the ForkJoinPool.commonPool().