[Simple-support] NullPointerException

[Eli K. <eli...@gm...>]

Hi all,

I'm running on android. I have a multi threaded executor that sometimes
crashes with the below error.
All my threads share the same strategy and persister:

  Strategy strategy = new AnnotationStrategy();

  Persister persister = new Persister(strategy);

When I recreate those two objects on every request the problem goes away,
but I thought the persister is thread safe.


Thanks

Eli

--- start stack tracks --

05-03 18:10:39.963: E/TaskManager(12862): java.lang.NullPointerException

05-03 18:10:39.963: E/TaskManager(12862): at
java.util.LinkedHashMap.postRemove(LinkedHashMap.java:291)

05-03 18:10:39.963: E/TaskManager(12862): at
java.util.HashMap.remove(HashMap.java:637)

05-03 18:10:39.963: E/TaskManager(12862): at
java.util.LinkedHashMap.addNewEntry(LinkedHashMap.java:186)

05-03 18:10:39.963: E/TaskManager(12862): at
java.util.HashMap.put(HashMap.java:411)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.PathParser.getElement(PathParser.java:262)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.ModelSection.getPath(ModelSection.java:121)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readElement(Composite.java:577)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readElements(Composite.java:506)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readSection(Composite.java:388)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:367)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readDefault(Composite.java:262)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:232)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:202)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:150)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Traverser.read(Traverser.java:92)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.CompositeList.populate(CompositeList.java:175)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.CompositeList.read(CompositeList.java:120)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readVariable(Composite.java:688)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readInstance(Composite.java:635)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readUnion(Composite.java:610)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readElement(Composite.java:593)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readElements(Composite.java:506)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.readSection(Composite.java:388)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:367)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Composite.read(Composite.java:174)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Traverser.read(Traverser.java:120)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Persister.read(Persister.java:879)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Persister.read(Persister.java:859)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Persister.read(Persister.java:836)

05-03 18:10:39.963: E/TaskManager(12862): at
org.simpleframework.xml.core.Persister.read(Persister.java:793)