Failed to send log payload for Jenkins workers

[cristianburca]

Describe the bug

We are using ec2 plugin to connect Jenkins workers and this is spot into their log.

INFO: Failed to send log payload: java.lang.NullPointerException: Name is null at java.base/java.lang.Enum.valueOf(Enum.java:238) at org.datadog.jenkins.plugins.datadog.DatadogClient$ClientType.valueOf(DatadogClient.java:39) at org.datadog.jenkins.plugins.datadog.clients.ClientFactory.getClient(ClientFactory.java:86) at org.datadog.jenkins.plugins.datadog.logs.DatadogWriter.write(DatadogWriter.java:80) at org.datadog.jenkins.plugins.datadog.logs.DatadogOutputStream.eol(DatadogOutputStream.java:47) at hudson.console.LineTransformationOutputStream.eol(LineTransformationOutputStream.java:61) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:57) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:75) at org.jenkinsci.plugins.credentialsbinding.masking.SecretPatterns$MaskingOutputStream.eol(SecretPatterns.java:104) at hudson.console.LineTransformationOutputStream.eol(LineTransformationOutputStream.java:61) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:57) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:75) at hudson.plugins.timestamper.pipeline.GlobalDecorator$GlobalDecoratorLineTransformationOutputStream.eol(GlobalDecorator.java:83) at hudson.console.LineTransformationOutputStream.eol(LineTransformationOutputStream.java:61) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:57) at hudson.console.LineTransformationOutputStream.write(LineTransformationOutputStream.java:75) at java.base/java.io.PrintStream.write(PrintStream.java:559) at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) at java.base/sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:104) at java.base/java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:181) at java.base/java.io.PrintStream.newLine(PrintStream.java:625) at java.base/java.io.PrintStream.println(PrintStream.java:883) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2801) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2762) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2757) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:2051) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommand(CliGitAPIImpl.java:2063) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getBranches(CliGitAPIImpl.java:3003) at hudson.plugins.git.GitAPI.getBranches(GitAPI.java:219) at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$9.execute(CliGitAPIImpl.java:3155) at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:170) at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:161) at hudson.remoting.UserRequest.perform(UserRequest.java:211) at hudson.remoting.UserRequest.perform(UserRequest.java:54) at hudson.remoting.Request$2.run(Request.java:377) at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829)

Label the issue properly.

• Add severity/ label.
• Add documentation label if this issue is related to documentation changes.

To Reproduce
Steps to reproduce the behavior:

1. Go to Jenkins worker linux server
2. Find remoting directory. Usually in /var/tmp/jenkins/remoting/logs
3. See error

Expected behavior
Same behaviour as Jenkins master where we are able to see everything working as expected.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment and Versions (please complete the following information):
A clear and precise description of your setup:

• version for this project in use: Datadog Plugin
  Version 5.5.0
• services, libraries, languages and tools list and versions.

Additional context
Add any other context about the problem here.