Jetty AS / dbxml crash

Question

Hi,
Find the code below. If I run this code on Jetty (6.1.21/newest) doing performance tests, Jetty and dbxml crash when putting 50+ docs simultaneously. Unfortunately, the log doesn't show any useful exceptions. BUT, if I run this code natively (without Jetty), dbxml does NOT crash and runs way over 1000 puts/s and as expected. Does anyone have and idea where to look after the problem? I'm really stuck here.
public void putDocument(String documentName, Document document) throws InternalServerErrorException {
     XmlContainer xc = containers.get(0).getXmlContainerUsers();
     XmlManager xm = null;
     XmlUpdateContext context = null;
     try {
          xm = xc.getManager();
          context = xm.createUpdateContext();
     } catch (XmlException e) {
           e.printStackTrace();
     XmlTransaction txn = null;
     try {                             
          if(getDocument(documentName) == null) {
               txn = xm.createTransaction();                           
                   xc.putDocument(txn, documentName, xm.createInputStream(transformDomToInputStream(document)), context);
                   txn.commit();
          } else {
               txn = xm.createTransaction();
               XmlDocument theDoc = xc.getDocument(documentName);
                   theDoc.setContentAsXmlInputStream(xm.createInputStream(transformDomToInputStream(document)));
               xc.updateDocument(txn, theDoc, context);
                   txn.commit();
     } catch (XmlException e) {
            if (txn != null) {
                   try {
                        txn.abort();
                   } catch (DatabaseException dbe) {
                        e.printStackTrace();
                   } catch (Throwable t) {
                      t.printStackTrace();
}Cheers
-Luca

Answer 1

Ocasionally (about 5-7x in 10 runs), I get the following error:
java.lang.NullPointerException: null upcall object
     at com.sleepycat.dbxml.dbxml_javaJNI.XmlContainer_updateDocumentInternal__SWIG_1(Native Method)
     at com.sleepycat.dbxml.XmlContainer.updateDocumentInternal(XmlContainer.java:930)
     at com.sleepycat.dbxml.XmlContainer.updateDocument(XmlContainer.java:445)
...Search engines (google, bing) do not find anything about it...
After that, Jetty crashes. So does dbxml. Any idea why that error occures? The error is thrown at txn.commit(), when trying to update a file.
            try {
                 theDoc = xc.getDocument(sb.toString());
              //File exists, update
                 xm = xc.getManager();     
                 txn = xm.createTransaction();
                 synchronized(txn) {
                         context = xm.createUpdateContext();
                   theDoc.setContentAsXmlInputStream(xm.createInputStream(DOMTransformer.transformDomToInputStream(document)));
                      xc.updateDocument(txn, theDoc, context);
                      txn.commit();
            } catch (XmlException e) {
                 if(e.getErrorCode() == XmlException.DOCUMENT_NOT_FOUND) {
                      //File does not exist, add new
                      try {
                           xm = xc.getManager();     
                        txn = xm.createTransaction();
                        synchronized(txn) {
                             context = xm.createUpdateContext();
                             xc.putDocument(txn, stringBuffer.toString(), xm.createInputStream(DOMTransformer.transformDomToInputStream(document)), context);
                             txn.commit();
                      } catch (XmlException xe) {
                           if (txn != null) {
                             try {
                                  txn.abort();
                             } catch (DatabaseException dbe) {
                                  e.printStackTrace();
                 }Cheers
- Luca
Edited by: user11808463 on 20.10.2009 02:54
Edited by: user11808463 on 20.10.2009 02:57