BasicComponentRegistryImpl.findFactory() concurrency issue ---------------------------------------------------------- Key: ISPN-10330 URL: https://issues.jboss.org/browse/ISPN-10330 Project: Infinispan Issue Type: Bug Components: Core Affects Versions: 10.0.0.Beta3, 9.4.15.Final Reporter: Dan Berindei Assignee: Dan Berindei Priority: Major Fix For: 10.0.0.Beta4, 9.4.16.Final When 2 threads try to create the same component concurrently and they also end up creating an {{AutoInstantiableFactory}} concurrently, one of them may get a {{NullPointerException}}. {noformat} org.infinispan.commons.CacheConfigurationException: Failed to construct component org.infinispan.factories.TestDelayFactory, path org.infinispan.factories.TestDelayFactory at org.infinispan.factories.impl.BasicComponentRegistryImpl.doInstantiateWrapper(BasicComponentRegistryImpl.java:169) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.instantiateWrapper(BasicComponentRegistryImpl.java:156) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent0(BasicComponentRegistryImpl.java:126) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent(BasicComponentRegistryImpl.java:66) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.findFactory(BasicComponentRegistryImpl.java:232) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent0(BasicComponentRegistryImpl.java:113) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent(BasicComponentRegistryImpl.java:66) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent0(BasicComponentRegistryImpl.java:106) ~[classes/:?] at org.infinispan.factories.impl.BasicComponentRegistryImpl.getComponent(BasicComponentRegistryImpl.java:66) ~[classes/:?] at org.infinispan.factories.AbstractComponentRegistry.getComponent(AbstractComponentRegistry.java:232) ~[classes/:?] at org.infinispan.factories.AbstractComponentRegistry.getOrCreateComponent(AbstractComponentRegistry.java:162) ~[classes/:?] at org.infinispan.factories.ComponentRegistryTest.lambda$testConcurrentLookup$1(ComponentRegistryTest.java:75) ~[test-classes/:?] at org.infinispan.test.AbstractInfinispanTest$CallableWrapper.call(AbstractInfinispanTest.java:528) [test-classes/:?] at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?] at java.lang.Thread.run(Thread.java:834) [?:?] Caused by: java.lang.NullPointerException at org.infinispan.factories.impl.BasicComponentRegistryImpl.doInstantiateWrapper(BasicComponentRegistryImpl.java:166) ~[classes/:?] ... 16 more {noformat}