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First, it may be an older version of Ant Second, the installation may be incomplete; dependent libraries or even dependent batch files, such as lcpbat, which antbat uses, may be missing Test: One trick is to have a build file that contains a target with the string <echo message="${anthome}"/> to see the Ant home directory Another is to search for all copies of antbat, antjar or just plain ant in the file system, which can highlight potential problems Fix: Remove or rename other copies, or reorder your path to place the version you want first 528.

Session session = sessionFactory.openSession(); Transaction tx = session.beginTransaction(); session.setCacheMode(CacheMode.IGNORE); for ( int i=0; i<100000; i++ ) { Item item = new Item(...); session.save(item); if ( i % 100 == 0 ) { session.flush(); session.clear();

} } tx.commit(); session.close();

Problem: Ant fails with an error about a missing task or library This can mean that a library containing needed task definitions is missing Unless your build file uses nonstandard extension libraries, the most common reason for missing many task definitions is that the optionaljar file has not been loaded and added to the ANT_HOME/lib directory Test: Look in the ANT_HOME/lib directory for the optional JAR file Fix: Download this file from the jakartaapacheorg web site, and drop it into the directory Problem: Ant still fails with an error about a missing task or library The error message can also mean that a task depends on one or more external JAR files that it cannot find Test: Determine which task failed by looking at the error text, then use the Ant manual to see what dependencies the task has.

Setting CacheMode.IGNORE tells Hibernate not to interact with the second-level cache, in this particular Session. The available options are as follows:

Next, check to see if the JAR file is on the system, either in the CLASSPATH environment variable or in the ANT_HOME/lib directory Fix: Download any needed JARs; place them in the ANT_HOME/lib directory Problem: The ANT_HOME directory points to the wrong place You should not actually need to set the ANT_HOME environment variable: most Ant launcher scripts will just assume that it is one directory up from where they are, then perhaps call other batch files, such as ANT_HOME/bin/lcpbat, to set up the classpath If ANT_HOME is set, but set to the wrong location, much confusion can arise A warning about lcpbat being missing is one obvious sign when calling antbat; another is failure to find antjar, with a Java error about the class orgapachetools antMain not being found Test: Look at the value of ANT_HOME and verify it is correct.

CacheMode.NORMAL The default behavior. CacheMode.IGNORE Hibernate never interacts with the second-level cache

Fix: Either set the variable to the correct location, or omit it Problem: Incompatible Java libraries on the classpath If you set up the CLASSPATH environment variable with a list of commonly needed JAR files, there is a risk that versions of common libraries, xmlParserAPIsjar and xercesjar in particular, clash with the versions Ant needs If this is a problem (it is very rare), then XML parsing is the most likely part of the Ant build to fail Test: Look at the value of CLASSPATH and verify it is empty or does not contain any XML parsers Fix: Either clear the environment variable completely or pull out the XML parser libraries..

CacheMode.GET Hibernate may read items from the second-level cache,

CacheMode.PUT Hibernate never reads items from the second-level cache,

Problem: Java extension libraries conflicting with Ant Java 12 and later supports extension libraries JAR files placed into JAVA_HOME\ jre\lib\ext are loaded by the run time using a different classloader than normal This can cause problems if any code in the extension libraries (such as jaxpjar) tries to locate classes loaded under a different classloader Test: Look in JRE/lib/ext directory for any JAR files that have crept in as extension libraries, and are confusing Ant Fix: Move the XML parser libraries to a different directory Problem: Sealing violation when running Ant This exception happens when a library has been marked as sealed but another library implements classes in one of the packages of the sealed library.