OutOfMemory error when trying to display resource adapters in web console ------------------------------------------------------------------------- Key: WFLY-10813 URL: https://issues.jboss.org/browse/WFLY-10813 Project: WildFly Issue Type: Bug Components: Management, Web Console Affects Versions: 10.0.0.Final, 13.0.0.Final Reporter: Helena Knyttlová Assignee: Harald Pehl Priority: Minor We have about 25 resource adapters set through CLI. When I want to display them in web administration console it kills the whole wildfly server - server is not responding and after several minutes it ends up with OutOfMemory error and server must be restarted. We've seen this issue since wildfly 10 (it was the first version we used). With only a few resource adapters it is not happening. Memory settings: JAVA_OPTS="-Xms512m -Xmx1024m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m The error which appeared on WidlFly 13.0.0.Final: {panel:title=Log} ERROR [org.jboss.as.controller.management-operation] (External Management Request Threads -- 1) WFLYCTL0013: Operation ("read-resource-description") failed - address: ([ ("subsystem" => "resource-adapters"), ("resource-adapter" => "AppAdapter"), ("connection-definitions" => "cp-host") ]): java.lang.OutOfMemoryError: Java heap space at java.util.HashMap.resize(HashMap.java:704) at java.util.HashMap.putVal(HashMap.java:629) at java.util.HashMap.put(HashMap.java:612) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:180) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:169) at org.jboss.dmr.ModelNode.clone(ModelNode.java:1867) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:180) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:169) at org.jboss.dmr.ModelNode.clone(ModelNode.java:1867) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:180) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:169) at org.jboss.dmr.ModelNode.clone(ModelNode.java:1867) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:180) at org.jboss.dmr.ObjectModelValue.copy(ObjectModelValue.java:169) at org.jboss.dmr.ModelNode.set(ModelNode.java:693) at org.jboss.as.controller.operations.global.ReadResourceDescriptionHandler$ReadResourceDescriptionAssemblyHandler.execute(ReadResourceDescriptionHandler.java:618) at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999) at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743) at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467) at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1404) at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423) at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243) at org.jboss.as.controller.ModelControllerImpl$$Lambda$490/414756260.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity$$Lambda$491/367363594.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:263) at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:229) at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:243) at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:212) at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72) at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:93) at org.jboss.as.domain.http.server.security.ElytronIdentityHandler.lambda$handleRequest$0(ElytronIdentityHandler.java:62) at org.jboss.as.domain.http.server.security.ElytronIdentityHandler$$Lambda$790/1228674018.run(Unknown Source) {panel}