xiang ming created LOG4J2-3092:
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Summary: JSON Template Layout JsonWriter formattableBuffer Memory
leak
Key: LOG4J2-3092
URL: https://issues.apache.org/jira/browse/LOG4J2-3092
Project: Log4j 2
Issue Type: Bug
Environment: <log4j2.version>2.14.1</log4j2.version>
Reporter: xiang ming
Attachments: image-2021-05-19-14-35-29-165.png,
image-2021-05-19-14-35-55-788.png
h1. JSON Template Layout
1 use recycler is queue or threadLocal
2 JsonWriter formattableBuffer receive big string
3 the StringBuilder inner char array expansion and length neverGetting smaller
E.g.:
{code:java}
public Object test() {
StringBuilder sb=new StringBuilder();
for(int i=0;i<10;i++){
for(int j=0;j<10;j++){
sb.append(UUID.randomUUID());
}
log.info(""+sb+sb);
}
return "success";
}
{code}
!image-2021-05-19-14-35-29-165.png!
!image-2021-05-19-14-35-55-788.png!
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