The server logging will continue to use the default Java Logging implementation. Java Logging is the default for client and server-side logging; Log4j is available only for server-side and not client-side logging.
The following example shows setting the value of the Log4jLoggingEnabled property to enable logging to a Log4j Logger in the Administration Server.
Note that after you run such a script, restart the server for the settings to take effect. You can enable Log4j for the server Logger as well as the domain Logger , which resides only on the Administration Server. The domain Log4j Logger reference is provided by invoking the weblogic.
The following example shows configuring the server Logger to use Log4j and the domain Logger to use the default Java Logger. The following is a Log4j logging configuration example that shows how to specify a severity level for Stdout and a filter for messages going to the server log file in the config. You have programmatic access to the Log4j Logger and its appenders handlers and layouts formatters for configuration purposes.
WebLogic logging services provide the Commons LogFactory and Log interface implementations that direct requests to the underlying logging implementation being used by WebLogic logging services. Example illustrates how to use the Commons interface by setting the appropriate system property.
When you use the org. LogFactory system property to implement the Commons interface as described here, you are implementing it for all application instances running on the server. For information on how to implement Commons logging for specific application instances, without affecting other applications, use the JDK service discovery mechanism or commons-logging.
This LogFactory creates instances of weblogic. LogFactoryImpl that implement the org. Log interface. The Commons Log interface methods accept an object. In most cases, this will be a string containing the message text. The Commons LogObject takes a message ID, subsystem name, and a string message argument in its constructor. See org. WebLogic Server provides a hierarchical Logger tree that lets you specify the Severity level for:. LogFactory interface is enabled.
All Loggers inherit their Severity level from the nearest parent in the tree. You can, however, explicitly set the Severity level of a Logger, thereby overriding the level that is set for the nearest parent. If you are using the Message Catalog Loggers, the Severity level for messages coming from a specific subsystem are determined by the Severity level of the root Logger. For example, suppose the root Logger severity level is Critical , and you want to set the Severity Level to Notice for the Security subsystem logger and to Warning for the EJB subsystem logger.
Note that each string is entered on an individual line in this properties box; that is, press the Enter key after each string, then click Save. For a complete index of all subsystem names, see Error Messages. The subsystem name is case-sensitive and must be entered exactly as shown in the Subsystem column of the index. For example, logger names could be a.
FooLogger or a. Barlogger , corresponding to the name of the classes in which they are used. In this case, each dot-separated identifier appears as a node in the Logger tree. For example, there will be a child node named " a " under the root Logger, a child node named " b " whose parent is " a ", and so on.
You can configure the Severity for a package or for any Logger at any level in the tree. For example, if you specify the Severity level for package a. You can, however, override the Severity level of a parent node by explicitly setting a value for a child node.
For example, if you specify the Severity level for logger a. The log messages are accumulated in predefined numbered log files. Whenever the file grows in size from the set size, depending on whether it is in development or production mode, the server rotates its server log file. By default, the rotated log files are numbered in order of creation filenamennnnn , where filename is the name configured for the log file.
By default, when you start a server instance in production mode , the server rotates its server log file whenever the file grows to kilobytes in size. It does not rotate the local server log file when you start the server.
You can change these default settings for log file rotation. For example, you can change the file size at which the server rotates the log file or you can configure a server to rotate log files based on a time interval.
You can also specify the maximum number of rotated files that can accumulate. After the number of log files reaches this number, subsequent file rotations delete the oldest log file and create a new log file with the latest suffix. WebLogic Server sets a threshold size limit of 2,, kilobytes before it forces a hard rotation to prevent excessive log file growth.
By default, the rotated files are stored in the same directory where the log file is stored. The following command specifies the directory location for the archived log files using the -Dweblogic. LogFileRotationDir Java startup option:. When the log file exceeds the rotation threshold that you specify, the server instance prints a log message that states that the log file will be rotated.
Then it rotates the log file and prints an additional message that indicates the name of the file that contains the old messages. For example, if you set up log files to rotate by size and you specify K as the minimum rotation size, when the server determines that the file is greater than K in size, the server prints the following message:.
Note that the severity level for both messages is Info. File systems such as the standard Windows file system place a lock on files that are open for reading. On such file systems, if your application is tailing the log file, or if you are using a command such as the DOS tail -f command in a command prompt, the tail operation stops after the server has rotated the log file. The tail -f command prints messages to standard out as lines are added to a file.
For more information, enter help tail in a DOS prompt. To remedy this situation for an application that tails the log file, you can create a JMX listener that notifies your application when the server emits the log rotation message.
When your application receives the message, it can restart its tailing operation. Server as well as application code write directly to these streams instead of using the logging mechanism. However, you can use a configuration option to redirect the JVM output to all registered log destinations, such as the server terminal console and the server log file. When this redirect is enabled, a log entry appears as a message of Notice severity. Note that redirecting the JVM output does not capture output from native code; for example, thread dumps from the JVM are not captured.
Redirecting JVM standard out and standard error messages to the WebLogic logging service by enabling the LogMBean attributes, as described in this section, has two key disadvantages you should be aware of:. JVM messages are redirected asynchronously. In the event of an overload situation, these messages may be dropped. Redirecting JVM messages to the WebLogic logging service in high volume can have a significantly negative impact on system performance and is therefore not recommended.
As a best practice for storing JVM standard out and standard error messages in a log file, Oracle recommends using one of the supported logging APIs instead. Using a logging API ensures that even during times of peak system load, messages are not lost, including the times when those messages are generated in high volume.
To configure WebLogic Server to redirect JVM standard out or standard error messages to the WebLogic logging service, you can do one of the following:. In the weblogic. Server command that starts WebLogic Server, include either or both of the following options, as desired:. It's important to know the identifier schemes.
Sometimes the logs use terms inconsistently. SetupDiag is a diagnostic tool that can be used for analysis of logs related to installation of Windows Updates. For detailed information, see SetupDiag. Skip to main content.
This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Note Many component log messages are invaluable if you are looking for problems in that specific area.
Determine the Windows Setup error code. This code should be returned by Windows Setup if it is not successful with the upgrade process. Based on the extend code portion of the error code, determine the type and location of a log files to investigate. Using the result code portion of the Windows Setup error code, search for the result code in the file and find the last occurrence of the code.
Alternatively search for the "abort" and abandoning" text strings described in step 7 below. When you have located the last occurrence of the result code, scroll up a few lines from this location in the file and review the processes that failed just prior to generating the result code. For example, assume that the error code for an error is 0xB - 0xD. Searching for "B" reveals the following content from the setuperr.
Some lines in the text below are shortened to enhance readability. The date and time at the start of each line ex: is shortened to minutes and seconds, and the certificate file name which is a long text string is shortened to just "CN.
This file is a local system certificate and can be safely deleted. Searching the setupact. This confirms our suspicion that this file is the cause of the upgrade failure:.
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