[GitHub] jaoki opened a new pull request #1750: Show stacktrace when Function fails

[GitBox <gi...@apache.org>]

jaoki opened a new pull request #1750: Show stacktrace when Function fails
URL: https://github.com/apache/incubator-pulsar/pull/1750
 
 
   
   
   ### Motivation
   
   This is particularly handy when you are submiting your function and your
   function fails, due to cases like Persistence.createEntityManagerFactory
   can't find a persistent-unit and PersistenceException(RuntimeException)
   is thrown.
   
   ### Modifications
   
   Add printStackTrace() when createInstance() failed.
   
   ### Result
   The following is added 
   ```
   java.lang.RuntimeException: User class constructor throws exception
           at org.apache.pulsar.functions.utils.Reflections.createInstance(Reflections.java:113)
           at org.apache.pulsar.functions.utils.Reflections.createInstance(Reflections.java:157)
           at org.apache.pulsar.admin.cli.CmdFunctions$FunctionDetailsCommand.doJavaSubmitChecks(CmdFunctions.java:356)
           at org.apache.pulsar.admin.cli.CmdFunctions$FunctionDetailsCommand.processArguments(CmdFunctions.java:292)
           at org.apache.pulsar.admin.cli.CmdFunctions$BaseCommand.run(CmdFunctions.java:112)
           at org.apache.pulsar.admin.cli.CmdBase.run(CmdBase.java:61)
           at org.apache.pulsar.admin.cli.PulsarAdminTool.run(PulsarAdminTool.java:167)
           at org.apache.pulsar.admin.cli.PulsarAdminTool.main(PulsarAdminTool.java:217)
   Caused by: java.lang.reflect.InvocationTargetException
           at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
           at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
           at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
           at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
           at org.apache.pulsar.functions.utils.Reflections.createInstance(Reflections.java:105)
           ... 7 more
   Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named myunit
           at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:61)
           at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
           ... 12 more
   ```
   in addition to the original message
   ```
   java.lang.IllegalArgumentException: The Java util function class MyContextFunction could not be instantiated from jar /myfunctions/pulsar-functions/target/pulsar-functions-LOCAL-SNAPSHOT-shaded.jar
           at org.apache.pulsar.admin.cli.CmdFunctions$FunctionDetailsCommand.doJavaSubmitChecks(CmdFunctions.java:370)
           at org.apache.pulsar.admin.cli.CmdFunctions$FunctionDetailsCommand.processArguments(CmdFunctions.java:292)
           at org.apache.pulsar.admin.cli.CmdFunctions$BaseCommand.run(CmdFunctions.java:112)
           at org.apache.pulsar.admin.cli.CmdBase.run(CmdBase.java:61)
           at org.apache.pulsar.admin.cli.PulsarAdminTool.run(PulsarAdminTool.java:167)
           at org.apache.pulsar.admin.cli.PulsarAdminTool.main(PulsarAdminTool.java:217)
   ```
   

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