Memory Leak on General Block when using Java Script

Hi,
I have a web view, that runs a html within the html there is a javascript which has a third party object this object displays some data and grows dynamically every time I invoke this object to grow I see in Instrument monitor whole bunch of Generalblock-256 ( 256 Bytes ) memory leak, I was wondering how can I manage this memory, I know in java script if we assign null to an object java will release it, but it's already reported the leak before I assign the object to null.
Is there any way I can use let's say by NSAutoReleasePool.
Thanks.

The Memory leak is pretty much gone, with new release of OS 2.2.1 as apple has done better memory management for safari.

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Memory leak under GNU/Linux when using exec()

Hi,
We detected that our application was taking all the free memory of the computer when we were using intensively and periodically the method exec() to execute some commands of the OS. The OS of the computer is a GNU/Linux based OS.
So, in order to do some monitoring we decided to wrote a simple program that called exec() infinite number of times, and using the profiler tool of Netbeans we saw a memory leak in the program because the number of surviving generations increased during all the execution time. The classes that have more surviving generations are java.lang.ref.Finalizer, java.io.FileDescriptor and byte[].
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class testExec
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            InputStream is = null;
            InputStreamReader isr = null;
            BufferedReader br = null;
            try
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                isr = new InputStreamReader(is);
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                if (br != null)
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}¿Is anything wrong with the test program we wrote? (we know that is not usual to call infinite times the command ls/dir, but it's just a test)
¿Why do we have a memory leak in Linux but not in Windows?
I will appreciate any help or ideas. Thanks in advance.

Hi Joby,
From our last profiling results, we haven't found yet a proper solution. We think that probably the problem is caused by the byte[]'s/FileInputStreams created by the class UNIXProcess that manage the stdin, stdout and stderr streams. It seems that these byte arrays cannot be removed correctly by the garbage collector and they become bigger and bigger, so at the end they took all the memory of the system.
We downloaded the last version of OpenJDK 6 (build b19) and modified UNIXProcess.java.linux so when we call its method destroy(), we assign to null those streams. We did that because we wanted to indicate to the garbage collector that these objects could be removed, as we saw that the close() methods doesn't do anything on their implementation.
public void destroy() {
     // There is a risk that pid will be recycled, causing us to
     // kill the wrong process! So we only terminate processes
     // that appear to still be running. Even with this check,
     // there is an unavoidable race condition here, but the window
     // is very small, and OSes try hard to not recycle pids too
     // soon, so this is quite safe.
     synchronized (this) {
         if (!hasExited)
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            stdin_stream.close();
            stdout_stream.close();
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So sadly, we still don't have a solution for that problem. You could try to compile OpenJDK 6, modify it, and try it with your program to see if the last version works for you. Compiling OpenJDK 6 in Linux is quite easy: you just have to download the source and the binaries from here and configure your environment with something like this:
export ANT_HOME=/opt/apache-ant-1.7.1/
export ALT_BOOTDIR=/usr/lib/jvm/java-6-sun
export ALT_OUTPUTDIR=/tmp/openjdk
export ALT_BINARY_PLUGS_PATH=/opt/openjdk-binary-plugs/
export ALT_JDK_IMPORT_PATH=/usr/lib/jvm/java-6-sun
export LD_LIBRARY_PATH=
export CLASSPATH=
export JAVA_HOME=
export LANG=C
export CC=/usr/bin/gcc-4.3
export CXX=/usr/bin/g++-4.3Hope it helps Joby :)
Cheers.

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Shifa,
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Please 'propose as answer' if it helped you, also 'vote helpful' if you like this reply.

Memory Leak on General Block when using Java Script

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