[keycloak-user] Keycloak will run server-jre only

Hi Team, Is their any restriction that keycloak will work with server-jre only and not with client-jre ? In my linux machine we have following version installed /usr/sbin/alternatives --config java There are 2 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-2.b16.el7_4.x86_64/jre/bin/java) + 2 /usr/java/jre1.8.0_102/bin/java Then its working fine with openjdk but keycloak not coming up with Oracle client-jre and giving this exception 2018-03-22 12:30:56,163 ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool -- 26) WFLYCTL0013: Operation ("add") failed - address: ([ ("subsystem" => "datasources"), ("data-source" => "KeycloakDS") ]): org.jboss.as.server.services.security.VaultReaderException: WFLYSRV0227: Security exception accessing the vault at org.jboss.as.server.services.security.RuntimeVaultReader.retrieveFromVault(RuntimeVaultReader.java:124) at org.jboss.as.server.RuntimeExpressionResolver.resolvePluggableExpression(RuntimeExpressionResolver.java:65) at org.jboss.as.controller.ExpressionResolverImpl.resolveExpressionString(ExpressionResolverImpl.java:341) at org.jboss.as.controller.ExpressionResolverImpl.parseAndResolve(ExpressionResolverImpl.java:246) at org.jboss.as.controller.ExpressionResolverImpl.resolveExpressionStringRecursively(ExpressionResolverImpl.java:143) at org.jboss.as.controller.ExpressionResolverImpl.resolveExpressionsRecursively(ExpressionResolverImpl.java:84) at org.jboss.as.controller.ExpressionResolverImpl.resolveExpressions(ExpressionResolverImpl.java:66) at org.jboss.as.controller.ModelControllerImpl.resolveExpressions(ModelControllerImpl.java:868) at org.jboss.as.controller.OperationContextImpl.resolveExpressions(OperationContextImpl.java:1269) at org.jboss.as.controller.ParallelBootOperationContext.resolveExpressions(ParallelBootOperationContext.java:438) at org.jboss.as.controller.AttributeDefinition$1.resolveExpressions(AttributeDefinition.java:619) at org.jboss.as.controller.AttributeDefinition.resolveValue(AttributeDefinition.java:683) at org.jboss.as.controller.AttributeDefinition.resolveModelAttribute(AttributeDefinition.java:642) at org.jboss.as.controller.AttributeDefinition.resolveModelAttribute(AttributeDefinition.java:616) at org.jboss.as.connector.util.ModelNodeUtil.getResolvedStringIfSetOrGetDefault(ModelNodeUtil.java:35) at org.jboss.as.connector.subsystems.datasources.DataSourceModelNodeUtil.from(DataSourceModelNodeUtil.java:178) at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceAdd.secondRuntimeStep(AbstractDataSourceAdd.java:348) at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceAdd$1.execute(AbstractDataSourceAdd.java:133) at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:980) at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:726) at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:450) at org.jboss.as.controller.ParallelBootOperationStepHandler$ParallelBootTask.run(ParallelBootOperationStepHandler.java:386) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) at org.jboss.threads.JBossThread.run(JBossThread.java:320) Caused by: org.jboss.security.vault.SecurityVaultException: java.security.InvalidKeyException: Illegal key size or default parameters at org.picketbox.plugins.vault.PicketBoxSecurityVault.retrieve(PicketBoxSecurityVault.java:297) at org.jboss.as.server.services.security.RuntimeVaultReader.getValue(RuntimeVaultReader.java:157) at org.jboss.as.server.services.security.RuntimeVaultReader.retrieveFromVault(RuntimeVaultReader.java:110) ... 25 more Caused by: java.security.InvalidKeyException: Illegal key size or default parameters at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1026) at javax.crypto.Cipher.implInit(Cipher.java:801) But same setup working with *open-jdk *without any issue after that i updated the Oracle Java and used *server-jre * [root@ha1 ~]# /usr/sbin/alternatives --config java There are 2 programs which provide 'java'. Selection Command ----------------------------------------------- * 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-2.b16.el7_4.x86_64/jre/bin/java) + 2 /usr/java/jre1.8.0_102/bin/java This time it worked totally fine and keycloak running without any issue . -- Subodh Chandra Joshi <subodh1_joshi82(a)yahoo.co.in&gt; http://www.questioninmind.com