Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Stack Overflow by Aman Jaiswal
, 1 year ago
could not extract ResultSet
via helptouser.com by Unknown author, 2 years ago
via Stack Overflow by Radzikowski
, 2 years ago
could not extract ResultSet
via Stack Overflow by nickik
, 2 years ago
via Stack Overflow by Faraz PV
, 1 year ago
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.	at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3039)	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3489)	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3478)	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4019)	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322)	at org.jboss.jca.adapters.jdbc.CachedPreparedStatement.executeQuery(CachedPreparedStatement.java:111)	at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462)	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:82)	at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.getResultSet(AbstractLoadPlanBasedLoader.java:449)	at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeQueryStatement(AbstractLoadPlanBasedLoader.java:202)	at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:137)	at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:102)	at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:100)	at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:693)	at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:92)	at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1933)	at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:558)	at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:260)	at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:554)	at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:142)	at org.hibernate.collection.internal.AbstractPersistentCollection$1.doWork(AbstractPersistentCollection.java:171)	at org.hibernate.collection.internal.AbstractPersistentCollection$1.doWork(AbstractPersistentCollection.java:156)	at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:260)	at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:155)	at org.hibernate.collection.internal.PersistentMap.size(PersistentMap.java:140)	at java.util.HashMap.putMapEntries(HashMap.java:500)	at java.util.HashMap.putAll(HashMap.java:784)	at org.keycloak.models.jpa.ClientAdapter.getProtocolMappers(ClientAdapter.java:304)	at org.keycloak.models.cache.entities.CachedClient.(CachedClient.java:75)	at org.keycloak.models.cache.entities.CachedRealm.(CachedRealm.java:201)	at org.keycloak.models.cache.infinispan.DefaultCacheRealmProvider.getRealm(DefaultCacheRealmProvider.java:153)	at org.keycloak.models.cache.infinispan.DefaultCacheRealmProvider.getRealms(DefaultCacheRealmProvider.java:193)	at org.keycloak.services.scheduled.ClearExpiredEvents.run(ClearExpiredEvents.java:16)	at org.keycloak.services.scheduled.ScheduledTaskRunner.run(ScheduledTaskRunner.java:27)	at org.keycloak.timer.basic.BasicTimerProvider$1.run(BasicTimerProvider.java:29)	at java.util.TimerThread.mainLoop(Timer.java:555)	at java.util.TimerThread.run(Timer.java:505)