candlerb opened a new issue #5533: Missing CLI error handling in pulsar-admin URL: https://github.com/apache/pulsar/issues/5533 **Describe the bug** pulsar-admin can raise Java exceptions in certain conditions **To Reproduce** (1) Giving an invalid command - e.g. "functions getstate" (should be "functions querystate"), with or without `--help` added ``` $ apache-pulsar-2.4.1/bin/pulsar-admin functions getstate Expected a command, got getstate Exception in thread "main" com.beust.jcommander.ParameterException: Asking description for unknown command: null at com.beust.jcommander.JCommander.getCommandDescription(JCommander.java:1003) at com.beust.jcommander.JCommander.usage(JCommander.java:988) at com.beust.jcommander.JCommander.usage(JCommander.java:980) at com.beust.jcommander.JCommander.usage(JCommander.java:972) at org.apache.pulsar.admin.cli.CmdBase.run(CmdBase.java:49) at org.apache.pulsar.admin.cli.PulsarAdminTool.run(PulsarAdminTool.java:218) at org.apache.pulsar.admin.cli.PulsarAdminTool.main(PulsarAdminTool.java:260) ``` (Hangs here, have to press `^C`) (2) Giving a querystate command without the "--key" option ``` $ apache-pulsar-2.4.1/bin/pulsar-admin functions querystate --name womble null Reason: java.lang.NullPointerException: path is 'null'. ``` tcpdump shows no traffic on port 8080, so this appears to be a local CLI issue. **Expected behavior** Error message to be reported
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