Adrien Grand created LOG4J2-1858:
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Summary: Memory issues with ParameterizedMessage
Key: LOG4J2-1858
URL: https://issues.apache.org/jira/browse/LOG4J2-1858
Project: Log4j 2
Issue Type: Bug
Reporter: Adrien Grand
ParameterizedMessage keeps track of a ThreadLocal<StringBuilder> in order to
save object creations. However, the reused string builders can only grow over
time, which may end up causing memory issues after some large messages have
been logged. This is especially true if the application uses a fixed thread
pool since the string builders cannot be collected at all.
One way to address that issue would be to drop the string builder if it grows
too large, but I have concerns that this could cause garbage collection issues
if this happens too often (since those string builders might not die young). So
maybe this class should go back to create the StringBuilder on demand and make
sure it always dies young?
For the record, this problem seems to have been introduced in LOG4J2-1271 /
https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;a=blobdiff;f=log4j-api/src/main/java/org/apache/logging/log4j/message/ParameterizedMessage.java;h=d315c1345b5fb72c8d88f5e1aa177011c7376fb9;hp=334e19ba7c188e8ac862863830cf17dca7b7007c;hb=dca586c;hpb=047565e8928b0c9893c25ee92ffdf48dbcd6965c.
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