Reading .txt log files
Log files stored as .txt files have two basic formats:
- The first format is the most common and usually starts with the date and time, providing information in the following manner:
For example:DateTime Appname ProcessID LoggingFeature LoggingComponent StructuredData LogLevel Message2019-04-23T13:16:56.883+0100 - CORE {wff-thread-37} none|none [{{Correlation-Id,b417051d-13c3-4a29-95f2-512c48b2b018}{Method,POST}{Uri,/tomcat/startup}{host,computer.example.com}}] - INFO Discrete snapin load finished - The second format, starting with a numerical level indicator, provides information in the following manner:
For example:Level Date Thread CID Message<#03>[30000] (09/10 00:00:00.122):{0x520} [DIAG] EVENT=Thread_report, THREADID=0x1390, THREADNAME="SRPReceiverHandler"
There may be some variation, based on the component or function that is being logged, but all log files stored as
.txt
files contain the following basic information.
Item | Description |
|---|---|
Date or Timestamp | A timestamp in of the form <Date><Time><difference from UTC>.
The Date/Time indicates the date and time of a particular event.
The date and time stamp are in the local server time. |
Hostname or component identification | Component identification, or hostname, tells you which component that the log file is for. In some cases, this is clear, such as CORE, in others it is less clear, using a numerical identifier |
Appname | The Appname is the same for all log files and is shown as MDM. |
ProcessID or Thread | Represents the Java Thread Id of the thread which is currently logging a message. For example:
|
MessageID | The MessageId identifies the type of message being sent to the log file. It is a combination of the feature and component being logged using the format <feature>|<component>. For example:
|
StructuredData | Zero or more name value pairs which represent structured data. For example:
|
Message | The message indicates the activity and describes the nature of the event. A message could include information about the hardware or software running, or the problem that is occurring. For example:
|
Level | The event level indicates the type of log entry. Commonly, events will fit into one of the following categories:
In some log files, the level is shown with a numerical value, in the following format:
|