Snyk test on Jenkins plugin fails with "MalformedInputException: Input length = 1" in debug log

Problem:

When testing Snyk projects using the Jenkins plugin, the scan may fail. 

When run with -d argument to generate debug logs, the line
Caused by: java.nio.charset.MalformedInputException: Input length = 1 is found 

Discussion:

This occurs when the following situation occurs:

• Jenkins Primary system is set to accept UTF-8 characters.
• Jenkins Build Agent is set to return ANSI character set.
• When Snyk tries to return a UTF-8 character from the build agent to the primary system, it fails convert to UTF-8 and dies with the MalformedInputException.

Resolution:

Options:

• Set the environment variable JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8 and restart the jenkins agent process.
• Add UTF.LANG 8 as an environment variable in the docker node that Snyk is running on