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Poor Performance in DB2 When Executing SQL Queries Over Big Tables Filtering by a Column With a Non-Unique Index

Liferay Support does not recommend or endorse specific third-party products over others. Liferay is not responsible for any instructions herein or referenced regarding these products. Any implementation of these principles is the responsibility of the subscriber. This article documents a...

Ehcache Configuration for Different Versions of the Liferay Platform

legacy How To

This article outlines Liferay configurations for distributed caching along with how to deploy custom tuning configurations. For cache tuning and finding optimal settings for a particular environment, please see the Ehcache website for documentation and support. Resolution How to...

A 'ClassNotFoundException' Thrown by WebLogic 12c

legacy Troubleshooting

This article documents a known issue that occurs when deploying portlets that use JNDI. Liferay Digital Experience Platform (DXP) isn't able to load Weblogic's JNDI classes by default, which often results in a ClassNotFoundException on weblogic.jndi.WLInitialContextFactory. Resolution...

Migrating properties which are set through Control Panel to portal-ext.properties file

legacy How To

Important Notification: Modifying the database is a risky operation! Always make a backup of your database before any modifications! If your custom portal properties are already set through the Control Panel then Liferay will not use the properties which are set up in...

Connecting WebDAV to Liferay Portal Running Behind a Web Server

legacy Troubleshooting

This article documents how to connect to Liferay WebDAV folders and files from a WebDAV client if Liferay Portal is running behind a web server. Specifically, this issue was found using the IBM WebSphere application server and IBM's HTTP Server (commonly abbreviated IHS). Clients have...

Copy File Error When Extracting a Liferay Bundle

legacy Troubleshooting

This article describes a workaround for the following known issue that you may encounter when using Liferay Portal with operating system Windows XP and/or Windows 7. The error reads: Error 0x80010135: File path is too long An unexpected error is keeping you from copying the file. If you...

Using Portal Properties for Separate Liferay Instances

legacy How To

Much like the portal-ext.properties file, portal-${instance}.properties files override properties set in portal.properties and other files for a specific Liferay instance. This article outlines the steps necessary to enable these portal properties files for a single instance. Resolution...

Setting Up Liferay Portal on Postgres 9

legacy How To

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. This article will explain how to create a database in PostgreSQL and configure a Liferay bundle to connect to it....

Session Variables / User Scoped Variables Development

legacy How To

This article documents how to use Session Variables / User Scoped Variables in conjunction with portlets. There is also an included example in the details to help demonstrate how this has already been implemented. Resolution PortletSession values should be scoped on a portlet and user...

Using JNDI Resources with Hibernate

legacy How To

If you are using Hibernate to connect to JNDI resources on Tomcat (or an application server that manages JNDI resources the same way), this tutorial is for you! As background, one way that Tomcat determines whether applications can access JNDI resources is by checking the context...

Self-Diagnose the Structural Issues in Custom JAR

legacy Troubleshooting

This article documents how to self-diagnose the structural issues in custom jars. There are different types of structural issues in custom jars, and this is a general guideline for developers to troubleshoot the structural issues during the development. Resolution 1. Use bnd Command to...

Liferay Upgrades: Updating Custom Plugins

legacy How To

The following article describes how to update plugins to be compatible with a new version of the Liferay platform. Resolution The Liferay API may change from release to release, causing issues when trying to port code to a new version of Liferay. Please follow these steps in order to...

Liferay Portal Database Portal Properties

legacy How To

This article is intended to provide a list of all of the Liferay Portal Database properties that can be used to connect your portal to various databases. To use any of them, un-comment the block of code and paste it into your portal-ext.properties file. For example, to enable MySQL, you...

Exporting Liferay's Database Schema on Oracle

legacy How To

In the course of investigating a Liferay platform issue, you may be instructed by Liferay Support to export your database schema in Oracle. The following article contains guidelines for this export. Resolution 1. Use Oracle Data Pump (EXPDP) for creating the export file. With the advent...

Modifying Liferay Page Messages Through Language.Properties

legacy How To

In order to change out of the box page messages within Liferay, one must configure the properties of the language.properties located in the portal-impl.jar/content/language.properties Resolution The master language.properties file is used in Liferay to display portal content. This also...

Liferay's "Verify" Process

legacy

This article explains a few key facts surrounding the "verify" process in the Liferay Portal and steps that need to be taken to ensure the integrity of the database being used by the Liferay Portal. Please note that this property was deprecated from 7.2.x with no direct replacement....

Installing Portlets Within the Control Panel in 6.1 GA2

legacy How To

In Liferay Portal 6.1 EE GA2, administrators do not have the ability to deploy plugins from the control panel. In order to achieve the installation of portlets not within Liferay Marketplace, the Private Plugin Installer must be installed. Resolution Download the Private Plugin Installer...

Autodeploying Plugins in WebSphere With Liferay 6.1 EE GA2

legacy How To

Starting with Liferay Portal 6.1 EE GA2, plugins can be autodeployed to WebSphere. As a part of the Liferay autodeploy process, the Liferay platform will call the Websphere's wsadmin script interface to deploy the plugin using a Jython script. In a Standalone WebSphere installation,...

Internal Server Error after Upgrade

legacy Troubleshooting

A common error is that sometimes when certain pages display an internal server error and there is no stacktrace. If there was a custom theme before the upgrade the page layouts will still reference them and if one has not installed or recompiled the layouts in a new sdk it will create a...

Applying Fix Pack 37 Causes Duplicate Entry of 'com.liferay.rss.web.internal.util.RSSFeed' for Key 'IX_B27A301F'

legacy Troubleshooting

This article documents a known issue when updating to Liferay DXP 7.0 Fix Pack 37 or higher. During the update process, the following error exists in the console: java.lang.RuntimeException: com.liferay.portal.kernel.upgrade.UpgradeException:...

Errors When Applying Support Driven Hotfixes Based on FP-41 or FP-42

legacy Troubleshooting

This article documents a known issue when applying a Liferay Support Driven Hotfix built off either DXP 7.0 Fix Pack 41 or Fix Pack 42. Due to an error generating the release notes, the documentation.xml file in Fix Packs 41 and 42 contains an invalid list of fixed issues. As a result, a...

Setting Up Liferay Portal Using Oracle Databases

legacy How To

Liferay Support does not recommend or endorse specific third-party products over others. Liferay is not responsible for any instructions herein or referenced regarding these products. Any implementation of these principles is the responsibility of the subscriber. This article is a guide...

Setting Up and Configuring MySQL Database With Liferay Portal

legacy How To

This article will help users by providing instructions for setting up MySQL on your machine, creating a new database, and then connecting Liferay Portal to that database. Resolution Installing MySQL Double click the MySQL version that you have obtained, either workbench or 5.1+ are...

UDP Multicast Protocols and Firewalls

legacy Troubleshooting

This article is designed to help system administrators troubleshoot a Liferay DXP instance deployed in a clustered environment. Some issues may arise because of too restrictive firewall settings (most, if not all, systems are protected by a firewall). And if certain ports are not opened...

Migrating Tag Sets During the Upgrade Process From Liferay Portal 5.2 to 6.0

legacy How To

This article outlines the changes to Tags and Tag Sets between Liferay Portal 5.2 to Liferay Portal 6.0, and later versions. Specifically: The changes to the Tags Navigation Portlet (Where Did Tag Sets Go?) How to migrate Tags to Categories and Tag Sets to Vocabularies. Resolution 1. The...

JBoss EAP vs. JBoss AS

legacy

Liferay Support does not recommend or endorse specific third-party products over others. Liferay is not responsible for any instructions herein or referenced regarding these products. Any implementation of these principles is the responsibility of the subscriber. One commonly asked...

Liferay DXP 7.1 Database Portal Properties

legacy How To

This article is intended to provide a list of all the Liferay DXP 7.1 database properties that can be used to connect your DXP 7.1 installation to various databases. To use any of them, uncomment the block of code you need, and paste it into your portal-ext.properties file. For example,...

Changes in Enabling serviceLocator Calls in Liferay DXP 7.0

legacy How To

This article documents a change in where to define serviceLocator properties in Liferay platforms; both in Portal and Digital Experience Platform (DXP). Developers familiar with this functionality in Portal 6.2 can enable or disable this property to allow specific calls in Freemarker or...

DLFileRank Causes Deadlock or SQL Update Batch Errors

legacy Troubleshooting

With DLFileRank enabled, Deadlock or SQL Update Batch Errors may happen due to DLFileRank updates. When using DLFileRank, unique constraints can be found due to the amount of writes that are done to the database. Many times it is helpful to take a look at the constraint that is causing...

Disabling Specific Built-In Portlets

legacy How To

Liferay comes equipped out-of-the-box with a variety of portlets that users may add to their page. For various reasons, however, an administrator may wish to remove some of these portlets from the pool of available portlets. Fortunately, this can be achieved either in the control panel...

Deploying Xuggler on Windows 64 bit

legacy Troubleshooting

Xuggler is a tool for users to encode and decode media files. Used in conjunction with Liferay Portal or Digital Enterprise 7.0, users can view media files on the Documents and Media portlet. The integration with Liferay is a .jar file downloadable from the Control Panel. There is a...

Declining One Event of a Repeating Event Declines Every Repeating Event

legacy Troubleshooting

This article documents how declining one event of a Repeating Event declines every repeating event. For example, if there is a weekly repeating event and a user declines that event in the third week—every repeating event is then declined. When you select Event Details, the option to...

Upgrading to Liferay Portal 6.0 EE SP2

legacy How To

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. When upgrading to the latest Liferay Portal, there are many things to take into account. This guide is designed to...

Structures With Duplicate Element Names Fail DDM Verification When Upgrading

legacy How To

This article documents a known issue in which structures with duplicate element names fail Dynamic Data Mapping (DDM) verification when upgrading from Liferay Portal 6.1 to Liferay Portal 6.2 or Liferay Digital Experience Platform 7.0 or 7.1. For customers who are upgrading their Liferay...

Upgrading to Liferay Portal 6.1 EE GA1

legacy How To

When upgrading to the latest version of Liferay Portal, there are many things to take into account. This guide is designed to assist in the upgrading process. Please read and ensure your environment is ready prior to performing the upgrade. Resolution These instructions should be used if...

Apache Struts 1 Known Vulnerabilities

legacy

QUESTION: How are Liferay DXP 7.0 and 7.1, and Liferay Portal, affected by the following vulnerabilities? CVE-2016-1181: Arbitrary code execution, denial of service CVE-2016-1182: XSS and denial of service CVE-2012-1007: Multiple cross-site scripting vulnerabilities CVE-2015-0899: Remote...

SQL Exception Warnings Appear During DXP Upgrade Indicating 'Fallback to recreating the table'

legacy

This article documents a false negative warning message that can occur when upgrading your Liferay platform, and which has caused some confusion amongst our users. During the Liferay DXP upgrade process, several WARN messages are issued with an SQL exception such as follows: 11:01:50,141...

Fix Pack and Hotfix installation order on Liferay Portal EE

legacy

The order of fix pack and hotfix updates are determined by engineering in several ways. This order is hardcoded in the update. Environment Versions previous to Portal 6.2 SP11 Resolution General Guidelines: The general order of installation is: Fix-Packs and Security Updates before...

Inputting Initial S3 Configuration Settings on DXP 7.0

legacy How To

This article serves as a reference for how to configure Liferay Digital Experience Platform (DXP) to use Amazon Web Services S3. DXP users can leverage Amazon S3 in two key areas; to serve as a file store repository, and to manage clustering. Regardless of which usage, there are three...

Update Manager gives plugin update reminders for up to date plugins

legacy Troubleshooting

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. This article documents a known issue where administrators may receive the message "Updates are available for...

System-ext.properties Reference Guide

legacy How To

This article serves as a reference guide for how to set system wide properties through the system-ext.properties file. Similar to the relationship between the portal.properties and portal-ext.properties files, administrators can affect system wide changes in the system.properties by...

Creating a Backup/Disaster Recovery Environment for Liferay Portal

legacy

This article gives an overview of a backup/disaster recovery environment that is necessary when starting a Liferay Portal project. This backup will often be referenced by Liferay Support Engineers as it is crucial to have a stable and working backup of the production environment to...

Apache Tomcat Security Advisory: CVE-2018-1336

legacy Troubleshooting

General Information CVE-2018-1336 reports that, "an improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service." This vulnerability is reported in the following versions: Apache Tomcat 9.0.0.M9...

Setting Up Liferay Portal on a DB2 Database

legacy How To

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. This article outlines steps on how to setup a DB2 connection with Liferay Portal. This article use properties set...

Moving Existing Data From an Old Liferay bundle to a New One

legacy How To

This article provides a checklist when you move your existing data from an old Liferay environment to a new one. Resolution For database, please backup the database in old environment and import it to the new environment. For documents, they are stored...

Using the Data Migration Tool in Liferay DXP 7.1

legacy How To

This article documents how to use the data migration tool in the Server Administration section of Liferay Digital Experience Platform (DXP) 7.1. The Data Migration Tool allows administrators to migrate data quickly between Documents and Media repository to another, such as moving from...

Upgrading to Liferay Portal 6.0 EE SP1

legacy How To

When upgrading to the latest Liferay Portal, there are many things to take into account. This guide is designed to assist in the upgrading process. Please read and ensure your environment is ready prior to performing the upgrade. Resolution These are listed in order of what should be...

Liferay Information for Common Application Servers

legacy

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. Resolution Tomcat JBoss Weblogic Websphere Glassfish WEB-INF Folder ${TOMCAT_HOME}/webapps/ROOT...

Document versioning won't display versions after 1.9 is entered

legacy Troubleshooting

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. Upon updating a document to the 10th version, you may see an error similar to this: ERROR...

Avoiding a Batch Error When Defining Friendly URLs

legacy Troubleshooting

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. If you have a user that has a friendly URL page like "myca" and that user tries to join the user group that also...

Stopping Liferay DXP 7.0 LPKG Modules

legacy

This article documents which LPKG files can be disabled with little or no negative effects as part of Liferay's introduction of modularity in Liferay DXP 7.0. Because certain core functionalities have been turned into modules using the OSGi framework, there are benefits which have been...

Understanding Languages in Liferay Portal

legacy How To

Liferay Portal is designed to handle as many languages as you want to support. This is done by pulling out all language specific text and storing it in the language.properties files. This way, when a page loads, Liferay Portal will detect the language, pull up the corresponding language...

Liferay DXP Javadocs

legacy How To

For developers, Liferay has created a set of documentation (Javadocs) that provide API and code detail for working with Liferay DXP's core software. To access the Javadocs, follow either one of the following instructions. For the zip file, navigate to the Liferay DXP 7.0 Fix...

Deploying Plugins via Administration Console

legacy How To

This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable. There are multiple application servers that allow users to deploy plugins via an administration console of some...

Anonymizing Data

legacy How To

Preserving anonymity of users when providing data to Liferay may be a concern for certain use-cases. The following guidelines should assist in determining which data should be anonymized and finding where 'sensitive' data can be located on Liferay's database. Resolution Create a SQL...

Managing Time Zones in DXP 7.0

legacy How To

This article documents how to change the time zone in your Liferay DXP 7.0 environment. Given that users are working with the Liferay platform from all over the world, it is important to have the ability to change the time zone. You can do this at two different levels; the individual...

Too Many CPU Intensive Tasks: A Common Performance Issue in DXP 7.0

legacy Troubleshooting

This article documents a common performance issue related to running Too Many CPU Intensive Tasks within Liferay DXP 7.0. Continue reading to discover the necessary information about this issue and how to navigate through it. The following are some of the more common causes and...

Setting Up the Liferay Platform on AWS EC2

legacy How To

This article is a guide to help users set up, install and cluster Liferay DXP 7.0 or 7.1 on AWS Elastic Compute Cloud (EC2). Resolution EC2 Instance Set Up There are 2 kinds of EC2 instances: (1) EC2-classic and (2) EC2-VPC. Please refer to Amazon's documentation for more detailed...

Removing '/web/' From Auto-Generated URLs

legacy How To

This article documents how the Liferay platform will automatically generate URLs appended with /web/, which can also be changed to a friendly URL. This may be an issue for those who do not want to append generated endings to URLs. For instance: http://liferay.com/web/page.html becomes...

Error Duplicate entry '0-3-925637128-com_liferay_site_navigation_menu_web_portlet_SiteN'

legacy Troubleshooting

Issue The following error is being reported in the logs multiple times: ERROR [http-nio2-8080-exec-143][JDBCExceptionReporter:234] Duplicate entry '0-3-925637128-com_liferay_site_navigation_menu_web_portlet_SiteN' for key 'IX_CB778855' Environment Liferay DXP 7.3 Liferay DXP 7.4...

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