maven surefire plugin runtime exception - writing xml report stdout/stderr

Problem: Sometimes you get the RunTime exception in your java projects. Example in an enterprise spring boot application when you use:

> mvn clean install

or, mvn package

See the error snapshot below:

Tests run: 325, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time:  24:49 min

[INFO] Finished at: 2020-04-13T13:25:50+05:30

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test (default-test) on project postbooking-ndc-pad: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test failed: java.lang.RuntimeException: org.apache.maven.surefire.report.ReporterException: When writing xml report stdout/stderr: /var/folders/3r/wl3bcq6x0cq1_zxj94xtz6ww0000gn/T/stdout8283814721678605256deferred (No such file or directory) -> [Help 1]

[ERROR] 

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR] 

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

Root cause:

This mainly happens because of using wrong/ old version of suefire in your pom.xml while some parts of your code requires higher versions in compilation.

Possible remediation:

1. Either ignore tests while building

>mvn install -DskipTests

2. or,  use latest Surefire in pom.xml 2.22.0

Covmerge : Merging two Bullseye Code coverage reports

Merge or combine two .COV Files

Bullseye is a nice tool for Code coverage computation. And I have been using it for quite some years now. There is a pretty nice feature about bullseye utility which we tend to forget in our day to day work with it.
This feature of Bullseye you should know. It is the ability to merge reports.

This is pretty useful when you have one report from your unit tests and one from some other type of test run. Particularly useful in following scenarios:

Merge two Bullseye reports .cov files together

how to Merge Bullseye code coverage reports gathered from different test runs

Merging Blackbox test automation code coverage reports with White box API Unit testcase coverage report

Whatever be your objective, Use this command to merge reports with Bullseye:
covmerge.exe -c -fMerged.cov file1.cov file2.cov

Obviously, for this command to Work, the bullsye installation directory path must be in your environment variables. ;)

Tell me how did you use this utility.
For more tutorials on Bullseye, see my earlier posts. You can read details, download the tutorial and software directly from BullsEye Official Website