Unexpected exception

#1

I'm evaluating object db, but, when I tried to persist some data got an error with no useful information:

 

[ObjectDB 2.8.2] Unexpected exception (Error 990)
  Generated by OpenJDK 64-Bit Server VM 1.8.0_232 (on Linux 3.10.0-957.27.2.el7.x86_64).
Please report this error on http://www.objectdb.com/issue/new
com.objectdb.o.InternalException: null
com.objectdb.o.InternalException
 at com.objectdb.o.VUT.i(VUT.java:229)
 at com.objectdb.o.VUT.i(VUT.java:150)
 at com.objectdb.o.UMR.w(UMR.java:462)
 at com.objectdb.o.UMR.f(UMR.java:405)
 at com.objectdb.o.UML.k(UML.java:489)
 at com.objectdb.o.MMM.j(MMM.java:870)
 at com.objectdb.o.EMR.c(EMR.java:144)
 at com.objectdb.o.TVS.b(TVS.java:105)
 at com.objectdb.o.TVS.b(TVS.java:94)
 at com.objectdb.o.EMR.g(EMR.java:78)
 at com.objectdb.jpa.EMImpl.merge(EMImpl.java:496)
My code
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
 at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
 at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
 at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
 at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
 at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:74)
 at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
 at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
 at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
 at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
 at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
 at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
 at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
 at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:202)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at java.util.ArrayList.forEach(ArrayList.java:1257)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at java.util.ArrayList.forEach(ArrayList.java:1257)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
 at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
 at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
 at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
 at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
 at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
 at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
 at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
 at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:137)
 at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98)
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)

 

#2

The stack trace seems to be related to the value of a primary key (id field), which is unexpected.

Could you please check the object that is sent to merge, and its primary key, and report back?

ObjectDB Support
ObjectDB - Fast Object Database for Java (JPA/JDO)

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