Simpleframework java.lang.StackOverflowError on tree deserializing

Question

I have large xml tree with following structure:

<?xml version="1.0"?>
<SampleElem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <Children>
      <SampleElem>
         <Children/>
         <Id>1</Id>
         <Value>Test2</Value>
      </SampleElem>
   </Children>
   <Id>-1</Id>
   <Value>Test1</Value>
</SampleElem>

I am trying to deserialize it using simpleframework:

Serializer serializer = new Persister();
SampleElem root = serializer.read(SampleElem.class, someStream, false);

After some time application stopped with error. Log from device:

E/AndroidRuntime(13591): FATAL EXCEPTION: AsyncTask #1
E/AndroidRuntime(13591): java.lang.RuntimeException: An error occured while executing doInBackground()
E/AndroidRuntime(13591):    at android.os.AsyncTask$3.done(AsyncTask.java:200)
E/AndroidRuntime(13591):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
E/AndroidRuntime(13591):    at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
E/AndroidRuntime(13591):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
E/AndroidRuntime(13591):    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
E/AndroidRuntime(13591):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
E/AndroidRuntime(13591):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
E/AndroidRuntime(13591):    at java.lang.Thread.run(Thread.java:1019)
E/AndroidRuntime(13591): Caused by: java.lang.StackOverflowError
E/AndroidRuntime(13591):    at java.lang.StringBuilder.append(StringBuilder.java:217)
E/AndroidRuntime(13591):    at java.lang.reflect.Modifier.toString(Modifier.java:285)
E/AndroidRuntime(13591):    at java.lang.reflect.Method.toString(Method.java:538)
E/AndroidRuntime(13591):    at java.lang.reflect.Method.equals(Method.java:361)
E/AndroidRuntime(13591):    at org.apache.harmony.lang.annotation.AnnotationFactory.invoke(AnnotationFactory.java:307)
E/AndroidRuntime(13591):    at $Proxy1.inline(Native Method)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.ElementListLabel.getConverter(ElementListLabel.java:160)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CacheLabel.getConverter(CacheLabel.java:280)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readVariable(Composite.java:604)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readInstance(Composite.java:573)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readUnion(Composite.java:549)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElement(Composite.java:532)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElements(Composite.java:445)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.access$400(Composite.java:59)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite$Builder.read(Composite.java:1383)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:201)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:148)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Traverser.read(Traverser.java:92)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.populate(CompositeList.java:175)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.read(CompositeList.java:120)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readVariable(Composite.java:623)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readInstance(Composite.java:573)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readUnion(Composite.java:549)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElement(Composite.java:532)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElements(Composite.java:445)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.access$400(Composite.java:59)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite$Builder.read(Composite.java:1383)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:201)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:148)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Traverser.read(Traverser.java:92)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.populate(CompositeList.java:175)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.read(CompositeList.java:120)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readVariable(Composite.java:623)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readInstance(Composite.java:573)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readUnion(Composite.java:549)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElement(Composite.java:532)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readElements(Composite.java:445)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.access$400(Composite.java:59)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite$Builder.read(Composite.java:1383)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:201)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.read(Composite.java:148)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Traverser.read(Traverser.java:92)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.populate(CompositeList.java:175)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.CompositeList.read(CompositeList.java:120)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readVariable(Composite.java:623)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Composite.readInstance(Composite.java:573)
E/AndroidRuntime(13591):    at org.simpleframework.xml.core.Compos

Data is completely correct, input xml is fully valid. Do you have any ideas?

Thanks!

UPDATE:

What about TreeStrategy? How it should be used? Have you any examples?

Can be a memory issue because the tree is too big? Did you try with smaller ones? — Evans, May 07 '13 at 21:45
Yes, tree has large hierarchical length, but I can't split it. I need to handle whole tree. Smaller tree works fine. — asolovyov, May 07 '13 at 21:54
Then try to increase the stack size of the JVM with -Xss. Check the question and the answers in this link http://stackoverflow.com/questions/3700459/how-to-increase-to-java-stack-size — Evans, May 07 '13 at 22:00
Thanks, but I cant apply it because I am working on Android mobile platform. Furthermore, increasing of stack size does not resolve problem. — asolovyov, May 07 '13 at 22:07
https://groups.google.com/d/msg/android-developers/CZbicbW2bCU/PtavBOnYJuQJ how to increase stack size in android. — Eluvatar, May 07 '13 at 22:21

score 1 · Answer 1 · answered May 08 '13 at 00:56

You can't change the default stack size, or the stack size of an existing thread, on Android. You can, however, set the stack size at the time a thread is created. Using the full constructor:

public Thread(ThreadGroup group, Runnable runnable, String threadName, long stackSize)

you can set the stack size up to 256KB.

So the strategy in your case would be to create a new thread with a deep stack, and run this parsing code on that thread.

Ravi K Thapliyal · Answer 2 · 2013-05-07T22:16:27.297

0

Change your stack size by passing the following JVM argument:

-Xss128m

Since, you're XML file is large and the parser seems to be doing a recursion (probably because <SampleElem> can have <SampleElem> as a child) stack size needs to be increased. The default size is 512 KB only.

Note: If the parsing still fails with 128m; keep doubling the size (like 256m, then 512m etc.)

edited May 07 '13 at 22:16

answered May 07 '13 at 22:09

Ravi K Thapliyal

51,095
9
76
89

It can't be used on Android. – asolovyov May 07 '13 at 22:12
1

Ah, I jumped the gun! Anyway, generally speaking if parsing an XML with memory constraints one should use a SAX parser (event based) instead of DOM that tries to have an in memory representation of the complete XML input. – Ravi K Thapliyal May 07 '13 at 22:23
Do you know any applicable libraries for automatic deserialization from xml to objects by SAX? – asolovyov May 07 '13 at 22:33
Not on Android, sorry I don't but perhaps that would make a good question on SO. :) – Ravi K Thapliyal May 07 '13 at 22:37

score 0 · Accepted Answer · answered Jun 18 '13 at 18:21

0

The most satisfactory solution in my case was rewrite my xml schema to linear structure. It reduced total memory requirements for deserializing tree.

Thanks all for comments.

answered Jun 18 '13 at 18:21

asolovyov

903
1
10
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Simpleframework java.lang.StackOverflowError on tree deserializing

3 Answers3