logging

How do you reproduce bugs that occur sporadically?

We have a bug in our application that does not occur every time and therefore we don't know its "logic". I don't even get it reproduced in 100 times today. Disclaimer: This bug exists and I've seen it. It's not a pebkac or something similar. What are common hints to reproduce this kind of bug? ...

Creating Read-only logs with python

I am writing a python script that needs to make a log entry whenever it's invoked. The log created by the script must not be changeable by the user (except root) who invoked the script. I tried the syslog module and while this does exactly what I want in terms of file permissions, I need to be able to put the resulting log file in an arb...

Any reason not to always log stack traces?

Encountered a frustrating problem in our application today which came down to an ArrayIndexOutOfBounds exception being thrown. The exception's type was just about all that was logged which is fairly useless (but, oh dear legacy app, we still love you, mostly). I've redeployed the application with a change which logs the stack trace on ...

CakePHP - get last query run

I want to get the last query CakePHP ran. I can't turn debug on in core.php and I can't run the code locally. I need a way to get the last sql query and log it to the error log without effecting the live site. This query is failing but is being run. something like this would be great: $this->log($this->ModelName->lastQuery); Thanks i...

log4j properties file: how to configure ?

Is it right that the procedure of using log4j looks like this: 1) put a .properties file somewhere in a project folder 2) in an initialization method, that runs only once, invoke PropertyConfigurator.configure("path_to_file"); 3) in every method we need to use logger we define a static logger variable and simply invoke getLogger(cla...

Rolling comments inside a log4net file

Rolling comments inside a log4net file Is it possible to roll the data inside the log file? So I have an xml config file like <log4net> <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender"> <layout type="log4net.Layout.PatternLayout"> <ConversionPattern value="%d{yyyy-MM-dd hh:mm:ss} – %-5p: %m%n" /...

What are the latest options in Java logging frameworks?

This question gets asked periodically, but I've long felt that existing Java logging frameworks were overcomplicated and over-engineered, and I want to see what's new. I have a more critical issue on my current project as we've standardized on JSON as our human-readable data encoding, and most logging frameworks I've seen require XML. ...

How to keep history of record updates in MySQL?

I have to create a code in PHP that will allow me to keep the history of record updates in MySQL database so I can find by date an old revision. Here is the example of what I actualy want to achive: http://en.wikipedia.org/w/index.php?title=Tunisia&amp;action=history The data are mostly Numbers that we record about the company for gene...

Customize elmah.axd output fields

ELMAH shows host, code, type, error, user, date and time by default on its error log web page. Is there any way to configure it and show other fields like IP or REFERER? ...

Analyze log files from many languages using a single tool. And recommendations of logging frameworks.

We have a system build on lots of languages. The ones we are interested in logging, in order of priority, are: C/C++ PHP C# Bash Java Wish list: If it is possible, we would like logging to be achieved from the above languages in such a way that we may use a single log viewing tool for all of them. Ideally they would be in the same ...

Can I get LogParser 2.2 to export into MySQL?

I've got an IIS site running with a MySQL db. Is there a way to get logparser to export into a MySQL database? ...

Logging ASMX Requests and Responses from Client

Hi, I've got a C# web application which I can't easily update the code of. However, I can make configuration changes to the application. The application calls out to a third-party ASMX web service, and I really need (if at all possible) to log the full XML requests and responses. I have no control over the web service so I have to do i...

Java Audit table logging, MySQL equivalent of CONTEXT_INFO.

Hi, I am looking for the MySQL equivalent of CONTEXT_INFO that is present in SQL Server. Or any other session variable like thing using which I can pass the username to the trigger. I am currently working on logging table data for audit. I need to pass the username of the logged in user to the delete trigger. Any ideas? We are deletin...

How to open a logfile in windbg from a script, such that each logfile is named by the timestamp of creation?

Hi,I want to run a windbg script that will accomplish the following: I want to track certain registers the moment an API is hit, without stopping due to timing issues. So , the moment the API is called, I want the script to open a logfile, echo the fact that the api is hit with the details of the parameters, and let it run till it hits ...

Based on your development stack, which is easier for you and why? Debugging or logging?

Please state if you are developing on the front end, back end, or if you are developing a mobile/desktop application. List your development stack Language, IDE, etc.. Unit Testing or no Unit Testing Be sure to include any AOP frameworks if used. Tell me if it is easier for you to use a debugger or to using logging during development, ...

How to debug .NET error logged in an Event Viewer ?

Hi I found out that my application causes some errors which are logged in an Event log. It states: NET Runtime 2.0 Error EventType clr20r3, P1 *****.exe, P2 1.0.0.0, P3 4b2a572f, P4 system.web.services, P5 2.0.0.0, P6 4889df18, P7 bc, P8 65, P9 system.net.webexception, P10 NIL. How can I find out what's going on? I've tried tha...

How to read log4j output to a web page?

I have a web page, used for admin purposes, which runs a task (image fetching from a remote site). In order to be able to debug the task using the browser only, no ssh etc, I'd like to be able to read all log output from the executing thread and spit it out to the web page. The task boils down to: Changing log level for current thread ...

How do I change the default format of log messages in python app engine?

I would like to log the module and classname by default in log messages from my request handlers. The usual way to do this seems to be to set a custom format string by calling logging.basicConfig, but this can only be called once and has already been called by the time my code runs. Another method is to create a new log Handler which c...

MySQL Insert Statement Queue

We are building an ajax application in which a users input is submitted for processing to a php script. We are currently writing every request to a log file for tracking. I would like to move this tracking into a database table but I do not want to run a insert statement after request. What I would like to do is set up a 'queue' of trans...

Where postgresql logs are on mac os x?

I would like to take a look to postgresql log files to see what my app tells him but I can't find them. Any ideas? ...