| Feed Contents | |||
|---|---|---|---|
| Design size of Collections | by wolf | 23-8-2008 9:24 | |
| eXist-db does not work/install on RedHat, Ubuntu, Linux | by wolf | 22-8-2008 20:31 | |
| Explicit validation does not work in Apache Tomcat | by wolf | 22-8-2008 20:30 | |
| eXist-db does not start in Apache Tomcat | by wolf | 22-8-2008 20:30 | |
| My webstart client does not start (with log) | by wolf | 22-8-2008 20:32 | |
Design size of Collections
What is the optimal number of documents in a collection?
With current eXist versions you have to find a compromise between query speed and update costs: storing all documents into a single collection results in fast queries. The drawback is that removing or replacing documents can become really slow! On the other hand, using one collection per document would guarantee that document updates run in linear time, but the query overhead would be considerable.
So if you need reasonable fast updates, the recommendation is to keep the number of documents in one collection below 2000 or so. Otherwise, if you never delete documents, you can easily store some 100,000 docs into one collection.
We plan to redesign the current index organization in the coming months.
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eXist-db does not work/install on RedHat, Ubuntu, Linux
Probably you use the default installed java version, gnu classpath/gjc. We recommend the Sun JVM, but JVMs of other vendors should work as well
Search for "gjc" in the errormessages:
java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(libgcj.so.70) at java.io.ObjectInputStream.read(libgcj.so.70 ) at java.io.InputStream.skip(libgcj.so.70) at com.izforge.izpack.installer.Unpacker.run(Unpacker.java:425) at java.lang.Thread.run(libgcj.so.70)
or
12 Aug 2008 16:34:31,161 [P1-9] WARN (ServletHandler.java [handle]:629) - Error for /exist/logo.jpg java.lang.NoClassDefFoundError: org.apache.cocoon.reading.ImageReader at java.lang.Class.initializeClass(libgcj.so.81) at java.lang.Class.newInstance(libgcj.so.81)
or
Exception in thread "main" java.lang.InternalError: unexpected exception during linking: java.lang.ClassNotFoundException: javax.swing.JFrame at 0x004f8ca3: java.lang.Throwable.Throwable(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x004ebb1e: java.lang.Error.Error(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x004f9086: java.lang.VirtualMachineError.VirtualMachineError(java.lang.String) (/usr/lib/./libgcj.so.3)
ant can help you out to determine the java version:
ant -diagnostics | grep java.vm
or
build.sh diagnostics | grep java.vm
results in
java.vm.version : 1.5.0_13-119 java.vm.vendor : Apple Inc. java.vm.name : Java HotSpot(TM) Client VM java.vm.specification.name : Java Virtual Machine Specification java.vm.specification.vendor : Sun Microsystems Inc. java.vm.specification.version : 1.0 java.vm.info : mixed mode
Explicit validation does not work in Apache Tomcat
There are indeed limitations regarding the functionality of the "validation:" functions, due to restrictions of tomcat. These are very vague.
eXist-db does not start in Apache Tomcat
The war files are tested and should work. Be sure that tomcat is not setup with the "SecurityManager" enabled (we should work this out) and that (for older versions of tomcat) all relevant XML jar files (xerces, resolver, xalan) have been installed in the 'endorsed' directory.
For more information check our documentation.
My webstart client does not start (with log)
Probably you see something like
An error occurred while launching/running the application. Title: eXist XML-DB client Vendor: exist-db.org Category: Security Error Unsigned application requesting unrestricted access to system Unsigned resource: http://localhost:8080/exist/webstart/stax-api-1.0.1.jar
while the exception reads like:
JNLPException[category: Security Error : Exception: null : LaunchDesc:
<jnlp spec="1.0+" codebase="http://localhost:8080/exist/webstart/"
href="http://localhost:8080/exist/webstart/exist.jnlp">
The solution is to re-sign the jar files:
build.sh -f build/scripts/jarsigner.xml jnlp-unsign-all jnlp-sign-all
