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Support Article

Blank Screen during login, after upgrading to Pega 7.1.7

SA-10716

Summary



After upgrading from PRPC 6.2 SP2  to Pega 7.1.7, a blank screen appears after login.

Error Messages



09:21:12,151 INFO  [stdout] (Dispatcher-Thread-114) 2015-06-04 09:21:12,141 [] [  STANDARD] (.DeclarativePageDefinitionImpl) ERROR   - Error occured while preloading declare pages
09:21:12,151 INFO  [stdout] (Dispatcher-Thread-114) java.lang.UnsupportedOperationException
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at java.util.Collections$UnmodifiableCollection.addAll(Collections.java:1085)
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.authorization.context.AppInfoImpl.init(AppInfoImpl.java:138)
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.authorization.context.AppInfoImpl.<init>(AppInfoImpl.java:75)
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.authorization.context.ContextUtils.createProductionSynthetic(ContextUtils.java:730)
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.authorization.context.ContextUtils.getRuleSetListForAccessGroup(ContextUtils.java:874)
09:21:12,152 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.authorization.context.ContextUtils.getRuleSetListForAccessGroup(ContextUtils.java:495)
09:21:12,153 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.exec.internal.declare.infengine.pages.DeclarativePageDefinitionImpl.initialize(DeclarativePageDefinitionImpl.java:630)
09:21:12,153 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.exec.internal.declare.infengine.pages.DeclarativePageDefinitionFactory.acquire(DeclarativePageDefinitionFactory.java:71)
09:21:12,153 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.exec.internal.declare.infengine.pages.DeclarativePageDefinitionCacheImpl.initialize(DeclarativePageDefinitionCacheImpl.java:299)
09:21:12,153 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.async.startup.DeclarativePageDefinitionsCacheTask.runTask(DeclarativePageDefinitionsCacheTask.java:21)
09:21:12,153 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.async.startup.StartupTaskUtil.runTask(StartupTaskUtil.java:63)
09:21:12,154 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.mgmt.PRNodeImpl.initializeSystem(PRNodeImpl.java:798)
09:21:12,154 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.mgmt.PREnvironment.getThreadAndInitialize(PREnvironment.java:371)
09:21:12,154 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.PRSessionProviderImpl.getThreadAndInitialize(PRSessionProviderImpl.java:1905)
09:21:12,154 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineStartup.initEngine(EngineStartup.java:657)
09:21:12,154 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._initEngine_privact(EngineImpl.java:165)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.doStartup(EngineImpl.java:138)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.session.internal.engineinterface.etier.ejb.EngineBean.doStartup(EngineBean.java:121)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
09:21:12,155 INFO  [stdout] (Dispatcher-Thread-114)  at java.lang.reflect.Method.invoke(Method.java:601)
09:21:12,156 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:338)
09:21:12,156 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:379)
09:21:12,156 INFO  [stdout] (Dispatcher-Thread-114)  at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable
...


Steps to Reproduce



1. Upgrade from PRPC 6.2 SP2 to Pega 7.1.7
2. Log into application using
administrator credentials.

Root Cause



The root cause of this problem is a defect in Pegasystems’ code/rules. A data page definition loading fails into the cache during startup and prevents rest of the remaining data page definitions from loading into the cache.


Resolution



This issue is resolved by Hfix-20115.

Published June 25, 2015 - Updated October 8, 2020

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