Sumit Singhal created LOG4J2-1502:
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Summary: CsvParameterLayout is inserting NUL character if data
starts with {, (, [ or "
Key: LOG4J2-1502
URL: https://issues.apache.org/jira/browse/LOG4J2-1502
Project: Log4j 2
Issue Type: Bug
Components: Layouts
Affects Versions: 2.6.2
Reporter: Sumit Singhal
I am using CsvParameterLayout to generate a CSV file out of log4j2. One of the
column is a JSON string. Following is the logger method I am using:
logger.info("log:{}",json);
Following is the JSON string:
{"id":10,"name":"sumit"}
And following is the string which is getting printed in CSV output file:
NUL{"id":10,"name":"sumit"}NUL
The NUL character is the \x00 character. When I open the file in notepad++,
then only this character appears. In notepad it shows as space. This poses a
problem in CSV processing module.
If there is some alphabet before {, then the output in CSV is fine. It seems as
if log4j is escaping '{' with a NUL character. It is happening if the string
starts with {, (, [, ' or ".
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