[jboss-jira] [JBoss JIRA] (WFLY-7037) Memory leak when doing deploy/undeploy app using REST and JPA

[ https://issues.jboss.org/browse/WFLY-7037?page=com.atlassian.jira.plugin.... ] Manuel Blechschmidt commented on WFLY-7037: ------------------------------------------- Hi guys, I used a quite dirty workaround to resolve this. Maybe this is interesting for others as well: {code} package de.blechschmidt.memory; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Modifier; import java.util.logging.Level; import java.util.logging.Logger; import javax.annotation.PreDestroy; import javax.ejb.Singleton; import javax.ejb.Startup; @Singleton @Startup public class MemoryLeakFixer { private static final Logger log = Logger .getLogger(MemoryLeakFixer.class.getName()); @PreDestroy public void clean() { try { log.info("Fixing Memory Leak from: WFLY-7037"); Class<?> classUtil = Class .forName("com.fasterxml.jackson.databind.util.ClassUtil"); // https://stackoverflow.com/questions/3301635/change-private-static-final-f... Field sCachedField = classUtil.getDeclaredField("sCached"); sCachedField.setAccessible(true); Field modifiersField = Field.class.getDeclaredField("modifiers"); modifiersField.setAccessible(true); modifiersField.setInt(sCachedField, sCachedField.getModifiers() & ~Modifier.FINAL); Class<?> lruMapClass = Class .forName("com.fasterxml.jackson.databind.util.LRUMap"); // Get a fresh new lruMap cache Object lruMap = lruMapClass .getConstructor(int.class, int.class) .newInstance(48, 48); // Reset the cache sCachedField.set(null, lruMap); } catch (ClassNotFoundException | NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException | InstantiationException | InvocationTargetException | NoSuchMethodException e) { log.log(Level.WARNING, "Could not clean Jackson", e); } } } {code} -- This message was sent by Atlassian JIRA (v7.2.3#72005)