[eml-dev] [Bug 2835] New: - Data Manager Library: Run-time errors involving Xalan classes

Tue May 1 13:46:50 PDT 2007

http://bugzilla.ecoinformatics.org/show_bug.cgi?id=2835

           Summary: Data Manager Library: Run-time errors involving Xalan
                    classes
           Product: EML
           Version: 2.0.1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: critical
          Priority: P1
         Component: datamanager
        AssignedTo: dcosta at lternet.edu
        ReportedBy: dcosta at lternet.edu
         QAContact: eml-dev at ecoinformatics.org

Two developers (myself and Chad Burt) are getting run-time errors when our
applications try to use the Data Manager library. The errors are
NoClassDefFoundError involving Xalan classes.

-----------------------------

On 4/30/2007, Chad Burt wrote:

Hi guys,
I am trying to deploy my sbc app with the datamanager library on a different
machine and am having some problems. It seems to be missing a dependancy that
is not on this fedora linux machine. I get this error:

Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/xpath/axes/PredicatedNodeTest

I never ran into this problem on my mac, i just built the jar and it worked
fine. Originally I thought it was because the jar needed to be recompiled
because I was on a different machine. So I copied the whole eml tree over, hit
"ant clean", then "ant dist-datamanager-lib", and uncompressed the zip to get
my jar. No error messages. Ran my dataset import method based off the sample
applications and I got the same error.

Is there some kind of apache library I need to have on this machine to get the
datamanager library working?

Here is the full stack trace:
Exception in thread "main" java.lang.NoClassDefFoundError :
org/apache/xpath/axes/PredicatedNodeTest
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
        at java.security.SecureClassLoader.defineClass
(SecureClassLoader.java:124)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run( URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java :306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        at org.apache.xpath.XPath.<init>(XPath.java:199)
        at org.apache.xpath.CachedXPathAPI.eval(CachedXPathAPI.java:322)
        at
org.apache.xpath.CachedXPathAPI.selectNodeIterator(CachedXPathAPI.java :216)
        at
org.apache.xpath.CachedXPathAPI.selectSingleNode(CachedXPathAPI.java:177)
        at
org.apache.xpath.CachedXPathAPI.selectSingleNode(CachedXPathAPI.java:157)
        at org.ecoinformatics.datamanager.parser.eml.Eml200Parser.parseDocument
(Eml200Parser.java:182)
        at
org.ecoinformatics.datamanager.parser.eml.Eml200Parser.parse(Eml200Parser.java:160)
        at
org.ecoinformatics.datamanager.DataManager.parseMetadata(DataManager.java:585)
        at
org.ecoinformatics.datamanager.sample.ImportDataset.testParseMetadata(ImportDataset.java:331)
        at
org.ecoinformatics.datamanager.sample.ImportDataset.main(ImportDataset.java:132)

-Chad Burt

-----------------------------

On 4/30/2007, Duane Costa wrote:

Hi Chad,

I recently started experiencing a very similar run-time error on my Windows
machine in an application I am developing that uses the datamanager library
too. The only difference is that in my case the NoClassDefFoundError was for a
different class:

org.apache.xpath.patterns.NodeTest

After a little trial and error, I found that I could resolve the error by
incorporating a newer version of xalan.jar, based on Xalan-Java Version 2.7.0,
into my classpath. I am attaching the xalan.jar file that fixed the problem for
me. It seems that the NodeTest class was missing from the older xalan.jar but
present in the newer xalan.jar. I'm guessing that the same might be true for
the PredicatedNodeTest class.

I don't really understand was caused the error to start occurring; it may have
something to do with the Java version I am running (I upgraded from Java 1.4.2
to Java 1.5.0 fairly recently). Jing and I will need to investigate this
further. Meanwhile, as a temporary fix, could you try including the new
xalan.jar file in your sbc application's classpath and let us know if that
resolves the error for you?

Thanks,
Duane

-------------------------------------

On 4/30/2007, Chad Burt wrote:

Thanks Duane,
I'm not too familiar with java and classpaths. I'm calling the datamanager.jar
from the command line. I replaced eml/lib/apache/xalan.jar with the one you
gave me. Is that correct? I'm getting the same error.
-Chad

---------------------------------

On 4/30/2007, Duane Costa wrote:

Hi Chad,

Interesting, I did exactly what you did, replaced eml/lib/apache/xalan.jar with
the one I sent you, and rebuilt datamanager.jar using 'ant
jar-datamanager-lib'. Now I'm getting the same error you've been getting! So
the new xalan.jar obviously is not the solution, but at least we're getting the
same error now. This is going to take more investigation. I'll try to get this
figured out. Meanwhile, could you please send me the following?:

(1) The output from running 'java -version' in a command window on your system.
(2) The output from running 'echo $CLASSPATH' in a command window on your
system.
(3) The exact command you use when you run the Data Manager library code.

Thanks,
Duane

------------------------------------

On 4/30/2007, Char Burt wrote:

Here's my info:

java -version:
java version "1.5.0_11"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_11-b03)
Java HotSpot(TM) Client VM (build 1.5.0_11-b03, mixed mode, sharing)

$CLASSPATH doesn't seem to be set, nor $CLASS_PATH. It's not set on my mac
either.

I am running a custom method based on the sample apps. I've attached the file.
It's usually under
/src/org/ecoinformatics/datamanager/sample/ImportDataset.java.
I call it via :
java -cp "datamanager.jar" org.ecoinformatics.datamanager.sample.ImportDataset
> /dev/null

Thanks for the help,
Chad