External document using XQuery doc() function - SEGV

Question

The following code involving an XQuery using the doc() function to access an external document via the filesystem produces a segmentation fault on Windows XP 32 using Java 1.6.11 and BDB XML 2.4.16 + P1.
The input doc is just "<Urmel>Huhuhu</Urmel>".
Maybe some basic error of mine. How am I supposed to access external documents via XQuery's doc() function?
Michael Ludwig
# Problematic frame:
# C  [libdbxml24d.dll+0x86401]
# The crash happened outside the Java Virtual Machine in native code.
package milu;
import java.io.File;
import com.sleepycat.db.Environment;
import com.sleepycat.db.EnvironmentConfig;
import com.sleepycat.dbxml.XmlException;
import com.sleepycat.dbxml.XmlManager;
import com.sleepycat.dbxml.XmlManagerConfig;
import com.sleepycat.dbxml.XmlQueryContext;
import com.sleepycat.dbxml.XmlResults;
import com.sleepycat.dbxml.XmlTransaction;
import com.sleepycat.dbxml.XmlValue;
public class TestExternalAccess2 {
     static final String envDirStr = "C:/MILU/data/dbenv46";
     static final File envDir = new File(envDirStr);
     static EnvironmentConfig envConf;
     static {
          envConf = new EnvironmentConfig();
          envConf.setAllowCreate(true);
          envConf.setRunRecovery(true);
          envConf.setInitializeCache(true);
          envConf.setInitializeLocking(true);
          envConf.setInitializeLogging(true);
          envConf.setTransactional(true);
     public static void main(String[] args) throws Exception {
          Environment env = new Environment(envDir, envConf);
          XmlManagerConfig mgrConf = new XmlManagerConfig();
          mgrConf.setAllowExternalAccess(true);
          XmlManager mgr = new XmlManager(env, mgrConf);
          String qry = "doc('file:C:/milu/dev/u.xml')";
          XmlQueryContext qc = mgr.createQueryContext();
          XmlTransaction txn = mgr.createTransaction();
          XmlResults res = mgr.query(txn, qry, qc);
          while (res.hasNext()) {
               XmlValue val = res.next();
               StringBuffer sb = new StringBuffer();
               sb.append(val.getClass());
               sb.append(" - ");
               sb.append(val.asString());
               System.out.println(sb.toString());
          res.delete();
          txn.commit();
}

Answer 1

I did a diff of my dbxml-2.4.16 and a clean version of dbxml-2.4.16 and found this difference, which looks like a fix for your bug. Please tell me if this works.
Lauren Foutz
--- dbxml-2.4.16-orig/dbxml/src/java/dbxml_java_wrap.cpp     2008-10-21 18:28:16.000000000 -0400
+++ dbxml-2.4.16/dbxml/src/java/dbxml_java_wrap.cpp     2009-02-27 15:24:32.000000000 -0500
@@ -1309,8 +1309,12 @@
                   break;
              default:
-                   if(docid != 0)
-                        (*cdoc).setAsNotMaterialized();
+                   if(docid != 0 && cid != 0)
+                         (*cdoc).setAsNotMaterialized();
+                    else if(!(*cdoc).getDbMinder().isNull() && cid == 0) {  //set query constructed documents as DOM
+                         (*cdoc).getDocDb();
+                         (*cdoc).setContentAsNsDom(docid, (*cdoc).getCacheDatabase());
+                    }
              createCPPMetaData(jenv, jdoc, cdoc);Edited by: LaurenFoutz on Apr 16, 2009 6:48 AM