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POMemory Leak in JNI layer for unsigned char array
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9493933
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9529276
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2012-02-29T05:16:44.720
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2012-03-02T06:57:16.447
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I have a JNI code that is used to make calls to .Net APIs from java. In one call, I convert a java byte array to a unsigned char array which is used for a .Net call. The unsigned char array that is created is wrapped over a Java Object and during the finalize call of that java object, i am clearing it. But on doing a continuous run, the memory just keeps on building which eventually ends up in OutOfMemoryException. <h2>Here is the code that is creating the unsigned char array</h2> <pre><code>jbyte* messageBodyNativeJByteBuffer = env->GetByteArrayElements(jByteArrayValue,NULL); if(messageBodyNativeJByteBuffer == NULL){ RaiseError(DNJNI_ERROR_ALLOCATE, "unsigned char array"); } jsize arrayLength = env->GetArrayLength(jByteArrayValue); array<unsigned char>^ dataArray = gcnew array<unsigned char>(arrayLength); try{ for(int i=0;i<arrayLength;i++){ dataArray[i] = messageBodyNativeJByteBuffer[i]; } return dataArray; }finally{ // Release the UTF8 bytes cout << "Inside BuildByteArray finally block."; env->ReleaseByteArrayElements(jByteArrayValue, messageBodyNativeJByteBuffer,0); cout << "Inside BuildByteArray finally block - After delete messageBodyNativeJByteBuffer."; delete messageBodyNativeJByteBuffer; env->DeleteLocalRef(jByteArrayValue); cout << "Inside BuildByteArray finally block - After DeleteLocalRef jByteArrayValue."; } </code></pre> <hr> and the clean up call, that clears it <hr> <pre><code>Object^ object = DotNETJNIInterface::NativeState::findState(identifier); //This if is I added recently to try deleting it, but does not help if(object->GetType()->ToString()->Equals("System.Byte[]")){ array<unsigned char>^ toBeDeleted = dynamic_cast<array<unsigned char>^>(object); delete [] toBeDeleted; cout << "Deleted Byte Array by self::::"; } DotNETJNIInterface::NativeState::removeState(identifier); </code></pre> <hr> Please let me know if there is something I am missing that is causing the byte array memory not to be deleted.
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<java><jni>
Title
Memory Leak in JNI layer for unsigned char array
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1. PO
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1. PTQuestion
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1. USGaurav Abbi
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