我在这里经常有一些Vaadin代码阻塞,我不知道问题是什么：

Thread 7892: (state = IN_JAVA)

- java.util.HashMap.getEntry(java.lang.Object) @bci=61, line=349 (Compiled frame; information may be imprecise)

- java.util.HashMap.containsKey(java.lang.Object) @bci=2, line=335 (Compiled frame)

- java.util.HashSet.contains(java.lang.Object) @bci=5, line=184 (Compiled frame)

- com.vaadin.ui.Table.unregisterPropertiesAndComponents(java.util.HashSet, java.util.HashSet) @bci=85, line=1693 (Compiled frame)

- com.vaadin.ui.Table.refreshRenderedCells() @bci=992, line=1641 (Compiled frame)

- com.vaadin.ui.Table.valueChange(com.vaadin.data.Property$ValueChangeEvent) @bci=23, line=2897 (Compiled frame)

- com.vaadin.data.util.IndexedContainer.firePropertyValueChange(com.vaadin.data.util.IndexedContainer$IndexedContainerProperty) @bci=140, line=553 (Compiled frame)

- com.vaadin.data.util.IndexedContainer.access$1000(com.vaadin.data.util.IndexedContainer, com.vaadin.data.util.IndexedContainer$IndexedContainerProperty) @bci=2, line=64 (Compiled frame)

- com.vaadin.data.util.IndexedContainer$IndexedContainerProperty.setValue(java.lang.Object) @bci=202, line=915 (Compiled frame)

- com.aimprosoft.wavilon.backgroundthreads.ChangeCdrThread.insertNewPersonIntoTable(com.aimprosoft.wavilon.model.Person, com.vaadin.ui.HorizontalLayout, com.aimprosoft.wavilon.ui.menuitems.CallContent, com.vaadin.ui.Table) @bci=924, line=208 (Interpreted frame)

- com.aimprosoft.wavilon.backgroundthreads.ChangeCdrThread$RepaintTableThread.run() @bci=622, line=446 (Compiled frame)

有人可以建议任何方法来进一步调试这个问题吗？问题很少发生,重现起来非常困难.