Util.loadClass() still swallows NoClassDefFoundError ---------------------------------------------------- Key: ISPN-3099 URL: https://issues.jboss.org/browse/ISPN-3099 Project: Infinispan Issue Type: Enhancement Components: Core Affects Versions: 5.2.5.Final Environment: Windows, JBoss EAP 5 Reporter: Bert Jacobs Priority: Major Fix For: 9.0.0.CR4, 8.2.7.Final Attachments: report-infinispan-logging.patch My log contains stack traces like the following: {code} Caused by: org.infinispan.CacheConfigurationException: Unable to instantiate class org.infinispan.loaders.bdbje.BdbjeCacheStore at org.infinispan.util.Util.loadClass(Util.java:101) at org.infinispan.util.Util.getInstance(Util.java:222) at org.infinispan.configuration.parsing.Parser51.parseLoader(Parser51.java:440) at org.infinispan.configuration.parsing.Parser51.parseLoaders(Parser51.java:418) at org.infinispan.configuration.parsing.Parser51.parseCache(Parser51.java:189) at org.infinispan.configuration.parsing.Parser51.parseNamedCache(Parser51.java:148) at org.infinispan.configuration.parsing.Parser51.readElement(Parser51.java:115) at org.infinispan.configuration.parsing.Parser51.readElement(Parser51.java:84) at org.jboss.staxmapper.XMLMapperImpl.processNested(XMLMapperImpl.java:110) at org.jboss.staxmapper.XMLMapperImpl.parseDocument(XMLMapperImpl.java:69) at org.infinispan.configuration.parsing.ParserRegistry.parse(ParserRegistry.java:77) ... 73 more Caused by: java.lang.ClassNotFoundException: org.infinispan.loaders.bdbje.BdbjeCacheStore at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:249) at org.infinispan.util.Util.loadClassStrict(Util.java:138) at org.infinispan.util.Util.loadClass(Util.java:99) ... 83 more {code} However, this ClassNotFoundException comes from the System classloader, but the code still swallows the following Error: {code} Caused by: org.infinispan.CacheConfigurationException: Unable to instantiate class org.infinispan.loaders.bdbje.BdbjeCacheStore at org.infinispan.util.Util.loadClass(Util.java:101) [SNIP - see above] at org.infinispan.configuration.parsing.ParserRegistry.parse(ParserRegistry.java:77) ... 73 more Caused by: java.lang.ClassNotFoundException: org.infinispan.loaders.bdbje.BdbjeCacheStore at org.infinispan.util.Util.loadClassStrict(Util.java:150) at org.infinispan.util.Util.loadClass(Util.java:99) ... 83 more Caused by: java.lang.NoClassDefFoundError: com/sleepycat/collections/TransactionWorker at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:249) at org.infinispan.util.Util.loadClassStrict(Util.java:138) ... 84 more Caused by: java.lang.ClassNotFoundException: com.sleepycat.collections.TransactionWorker from BaseClassLoader@3598d24f{vfsfile:/D:/App/Java/jboss/brms-standalone-5.3.0/jboss-as/server/lettergen-ds-default/deploy/modeshape-datastore.ear/} at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:477) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 87 more {code} It is this error which is actually important: the BdbjeCacheStore class was found but it cannot be loaded because the sleepycat jar is not on the classpath. It is impossible to see this without changing the code. The commits for ISPN-2559 did not properly fix this problem. The Error should be logged in all cases because the ClassNotFoundException will also happen in almost every case: the last search ClassLoader is the System ClassLoader which will likely never have the searched class. Once again: please log all NoClassDefFoundErrors (suppressing Errors is bad in any case) or at least handle them *before* handling any ClassNotFoundExceptions. The attached patch does exactly that.