WebLogic Server Logging

Understanding WebLogic Logging Services

– WebLogic logging services provide facilities for writing, viewing, filtering, and listening for log

– These log messages are generated by WebLogic Server instances, subsystems, and Java EE

messages.

applications that run on WebLogic Server or in client JVMs.

• WebLogic Server subsystems use logging services to provide information about events

– Ex. deployment of new applications or the failure of one or more subsystems

• Each WebLogic Server instance maintains a server log

• Logging services collect messages that are generated on multiple server instances into a

single, domain-wide message log

• The domain log provides the overall status of the domain

Log Message Format

Here is an example of a message in the server log file:

####<Sept 22, 2004 10:46:51 AM EST> <Notice> <WebLogicServer> <MyComputer>

<examplesServer> <main> <<WLS Kernel>> <> <null> <1080575211904> <BEA-000360>

<Server started in RUNNING mode>

• In this example, the message attributes are:

Locale-formatted Timestamp, Severity, Subsystem, Machine Name, Server Name, Thread ID, User ID,

Transaction ID, Diagnostic Context ID, Raw Time Value, Message ID, and Message Text.




Time stamp Time and date when the message originated.

The Java Virtual Machine (JVM) that runs each WebLogic Server instance refers to the host computer

operating system for information about the local time zone and format.

Severity Indicates the degree of impact or seriousness of the event reported by the

message.

Subsystem Indicates the subsystem of WebLogic Server that was the source of the

Machine Name

Server

Name

Thread ID

message; for example, Enterprise Java Bean (EJB) container or Java

Messaging Service (JMS).

Identifies the origins of the message:

 Server Name is the name of the WebLogic Server

 Machine Name is the DNS name of the computer

 Thread ID is the ID that the JVM assigns to the thread in which the

message originated

User ID The user ID under which the associated event was executed

Transaction ID Present only for messages logged within the context of a transaction

Diagnostic

Context ID

Raw Time Value The timestamp in milliseconds

Message ID A unique six-digit identifier

Context information to correlate messages coming from a specific request or

application

All message IDs that WebLogic Server system messages generate start with

BEA- and fall within a numerical range of 0-499999.

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Message Text A description of the event or condition.