Do not use the same PatternLayout for different appenders.
PatternLayout has a StringBuffer field that is only used in format().
Multiple appenders end up sharing the same buffer.
----------
Sometimes an event would get written to a wrong file (in addition to, and
sometimes in place of the correct file).
I set my category based on a user session and each session creates its own
log file(for now there's only one FileAppender for the Logger):
For the most part, I logging works great. But every now and then, I get the
wrong events. . .
I only discovered this during Load Testing. I had 32 clients running.
So then I took the Load Testing tool down to just 2 clients.
Here are some of the things I notice:
1. The majority of the events get written to the correct file.
2. Sometimes, an event would get written to its file in addition to the
other.
3. Sometimes, and event on a Logger would get written to the other file.
Snippet from File51 (see line 2):
2002-08-13 18:17:20.119 - SQL - File51-1 row(s) returned
2002-08-13 18:17:20.169 - SQL - File56-1 row(s) returned
2002-08-13 18:17:20.159 - TRACE -
File51-<TetcoContractLookupProcess_Impl> Defaulting lookupDate
2002-08-13 18:17:20.300 - SQL - File51-SELECT ....
4. Most of the times when the error happens, the two clients fired a
logging event at the same time as the other.
Snippet from File51(see line 3):
2002-08-13 18:17:11.637 - TRACE - File51-<TCLookupProcess_Impl>
Defaulting lookupDate
2002-08-13 18:17:11.647 - SQL - File51-SELECT ...
2002-08-13 18:17:11.727 - SQL - File56-SELECT ...
2002-08-13 18:17:11.727 - SQL - File51-1 row(s) returned
2002-08-13 18:17:11.757 - TRACE - File51-<TCLookupProcess_Impl>
Defaulting lookupDate
5. On occassion, I'll see the timestamping not come in order
Snippet from File51(see line 2):
2002-08-13 18:17:28.191 - TRACE - File51-<Object_DataAccess> findMany:
1 row(s) returned from QueryCache
2002-08-13 18:17:28.301 - LOG - File56-Processing
SRVLT_CNT=5&SID=UXUBCFYAAAAAKCXYCCCDIWQ
2002-08-13 18:17:28.281 - TRACE - File51-<TCLookupProcess_Impl>
Defaulting lookupDate
Any ideas?
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