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Questions tagged [mdc]

MDC (*mapped diagnostic context*) is a way to attach thread-scoped named identifier that can be added to every log message from that thread.

It is used to provide log messages with information that is unavailable to the scope when log is written.It provides the thread and user context to log messages and hence stamp each log for better tracking.

For example, it can help put Correlation Id to a request’s logs to help filter it out from similar logs at that time (from other quests) and also track it easily when this request hop from service to service by sharing the Correlation Id.

Typical use cases

Useful links

288 questions
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Java logging - MDC.put delay?

I'm trying to setup some logging. Specification is to have separate logs per ip. Let's forget large number of files for now. In my logback.xml I have:
parvuselephantus
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SLF4J MDC logging spring boot project included as dependency in other project not working

I have spring boot application A which has MDC logging is added as dependency in project B which also has MDC logging. Both works when they are run independently Problem is : When I run the project B application, logs of B are displayed. I need the…
Rajesh Yarraguntla
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How can I transfer a stacktrace betwen Scala ExecutionContexts?

I have written a small utility wrapper around the Scala ExecutionContext to enable transfer of MDC contexts across Future instances. It works as expected but an undesired side-effect is that we now don't seem to get stack traces that go across…
tjarvstrand
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log4j2.xml file has KeyValuePair set in MDC. If key is not set, how can we omit the value altogether from the log line?

If I have a KeyValuePair in my JsonLayout appender, and that pair is not set in the MDC, is there a way to exclude the value from the logs?
Mike
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Sfgrid column headers don't line up with the columns

I tried AutoFit="true" TextAlign="TextAlign.Left" and messing with the widths. I'm having difficulty getting the headers to line up with the columns.
webdev5
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spring/logback - log http request body for errors only

I am using MDC inside an interceptor to add http request related fields to my logging. Now, i want to log the request body along any log of level error or fatal and/or for exceptions as well. I am totally new to MDC, spring or java in general. The…
esskar
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Set MDC properties only for rabbitmq events

I want to apply filters to log only for rabbit events using MDC properties. And set trace Id && correlation id from the event header. I already have a RequestResponseLoggingFilter which is used for setting the tenant Id. I am not sure how to…
rakesh
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spring jms - perform action before message received

Is it possible to perform an action before a jms message is received in spring boot? I know I could put it at the very top of my @JmsListener, but I have several listeners and I'd prefer avoiding adding a call to all of them. I'm trying to use the…
anztenney
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MDC is not transfered from Hystrix thread to tomcat thread

I have a classA which is running on Tomcat thread. ClassA is maintaining a set of MDC key-values pairs. As the ClassA is executed, MDC.getCopyOfContextMap() returns (A="a", B="b", C="c") Now, ClassA calls classB which is running on Hystrix thread.…
P_user526
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How to manage log file switching through custom user event in Spring?

Suppose we use Logback for logging. It’s required to change the path to the log file every time a certain event (i.e. function call) occurs. For example, somewhere we call a function. startNewLogSegment("A") After this event, the logger is expected…
diziaq
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How do we get user request, response, and request-id along with process-id in spring-boot logging using logback.xml and MDC?

I have been trying to create a logback.xml logging pattern for my spring-boot project in which I can get some requirements. I want to print data in logging pattern (such as process-id, request-id, user request data for a particular API request,…
suv1sh
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Nlog Doesn't Work Correctly In Dotnetty Handler

I wrote a Dotnetty server and used Nlog as the logging framework. Every connection has its own ID and I want to log this ID alongside other data(message, Datetime, etc...) to Sql. As Dotnetty handles multiple connections by single thread, using…
user2981114
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camel-opentracing: adding baggage to span as cross-cutting-concern

I have a camel blueprint application with many routes, all called from a process manager. The process manager sends a process instance id. I want to use the incoming process instance id in opentracing spans and in MDC logging. The obvious idea is an…
dschulten
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How to use MDC in with hystrix in Spring Boot 2?

We are using hystrix in our spring boot application. We wants to use MDC for appending specific attributes like Request Id and Request URI and Loggedin User to every log statement. This mechanism is not working wherever hystrix is…
Sumanth Varada
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JBOSS MDC for every request including thread pool

i am using JBOSS EAP 7, using MDC i am able to track to my IPAddress for every ServletRequest using MDC.put("IPAddress",.getInetAddress()) but only for parent thread, not for child thread how can achieve for child threads
Prasanth Kumar K
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