Oc4j Error Log
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using the system and application logging features available in OC4J. It covers the following: Log Files Generated by OC4J Using
Oracle Log File Location
Plain Text File Logging Using Oracle Diagnostic Logging (ODL) Log how to check log files in oracle Files Generated by OC4J Each OC4J process generates a number of log files to aid in troubleshooting. If there are multiple processes running for an OC4J instance, multiple sets of log files are generated. There are two types of log files that can be generated by OC4J: Plain text log files Plain text logs are the default log files used for OC4J components, and are ideal for use in a development environment. The messages logged in these text files can be read with any editor, including the Oracle Enterprise Manager 10g Application Server Control Console. Oracle Diagnostic Logging (ODL) Log Files The messages logged in these files use an XML format that is viewable through Application Server Control Console. The key benefit of ODL is that it supports log file rotation. Log files are generated in different locations, depending on the component or application that data is being recorded for. The logging configuration for each component or application is defined in component-specific XML configuration files. Table 10-1 lists the names and locations of the various log files generated, as well as the XML configuration file containing the logging configuration for each component. Unless otherwise indicated, all paths indicated are within ORACLE_HOME/j2ee/home for standalone OC4J, or ORACLE_HOME/j2ee/instance_name for OPMN-managed instances. Table 10-1 List of Log Files Generated for OC4J Component Configuration File Default Log File Name and Location OC4J components using Java logging See "Configuring OC4J Logging" for details on configuring this ODL-formatted log file. Standalone OC4J: /log/oc4j/log.xml OPMN-managed OC4J: /log/instance_default_group_1/oc4j/log.xml Application Server Control
content in any way. 5 Managing Log Files Oracle Application Server components generate log files containing messages that record all types of events, including startup and shutdown information, errors, warning messages, access information on HTTP requests, and additional information. This chapter describes how to view and manage log files to assist in monitoring system activity and in diagnosing system problems. It contains the following topics: Introduction to Oracle Application Server Logging Listing and Viewing Log Files with Application Server Control http://docs.oracle.com/cd/B25221_04/web.1013/b14432/logadmin.htm Searching Diagnostic Messages in a Log Repository Diagnosing Problems and Correlating Messages Using Oracle Application Server Log Loader Advanced Logging Topics 5.1 Introduction to Oracle Application Server Logging The Application Server Control Console lets you list and search log files across Oracle Application Server components. You can view log files from the Application Server Control Console pages or https://docs.oracle.com/cd/B14099_19/core.1012/b13995/log.htm download a log file to your local client and view the log files using another tool. This section covers the following topics: Understanding Log File Data and Naming Using a Log Repository Configuring Component Logging Options 5.1.1 Understanding Log File Data and Naming Several Oracle Application Server components use Oracle Diagnostic Logging (ODL). Using ODL, log file naming and the format of the contents of log files conforms to an Oracle standard and the diagnostic messages are written in XML. Some Oracle Application Server components do not use ODL, and write their diagnostic messages using a component specific text format. Regardless of the format of the messages that are stored in log files, ODL or text based, you can view log files using the Application Server Control Console, or you can download log files to your local client and view them using another tool (for example a text editor, or another file viewing utility). This section covers the following topics: ODL Message Formatting and ODL Log File Naming Log File Messages by Compo
that you may encounter when using OC4J and explains how to resolve them. It includes the following topics: Problems https://docs.oracle.com/cd/B14099_19/web.1012/b14361/diagnosis.htm and Solutions Need More Help? A.1 Problems and Solutions This https://learnwithme11g.wordpress.com/2009/09/29/r12-how-to-enable-logging-for-apacheoc4j-and-opmn/ section describes common problems and solutions. It contains the following topics: Unable to Start OC4J When Using JDK 1.3 Unable to Restart OC4J After Abnormal Termination When OracleAS JMS is Active Stateful Replication Not Consistent Across OC4J instances Using A Non-Certified Version log file of the JDK for OC4J Only java.lang.OutOfMemory Errors Thrown When Running OC4J Connection Timeouts Through a Stateful Firewall Affect System Performance OPMN-Managed OC4J Unable to Access EJB Resources Via the Default RMI Port Application Performance Impacted by JVM Garbage Collection Pauses Invalid or Unneeded Library Elements Degrade Performance JSP Error: Tag Not Registered oc4j error log JSP Error: Zero-Length Class File JSP Error: Illegal use of
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