Richard Eckart de Castilho created POOL-411: -----------------------------------------------
Summary: Potential NPE when deregistering key at end of borrow Key: POOL-411 URL: https://issues.apache.org/jira/browse/POOL-411 Project: Commons Pool Issue Type: Task Affects Versions: 2.11.1 Reporter: Richard Eckart de Castilho There is a potential for an NPE happening in the finally block of borrowObject: {noformat} Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.commons.pool2.impl.GenericKeyedObjectPool$ObjectDeque.getNumInterested()" because "objectDeque" is null at org.apache.commons.pool2.impl.GenericKeyedObjectPool.deregister(GenericKeyedObjectPool.java:821) at org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:507) at org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:350) {noformat} >From reading the code, it seems this could happen e.g. if a pool is >concurrently cleared while a borrow is in progress. Not sure what a proper solution here would be. Maybe deregister should silently do nothing if poolMap.get(k) returns null? -- This message was sent by Atlassian Jira (v8.20.10#820010)