[zeppelin] branch master updated: [ZEPPELIN-5233]. Clear output before running paragraph

[zj...@apache.org]

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zjffdu pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/zeppelin.git


The following commit(s) were added to refs/heads/master by this push:
     new dfed9b8  [ZEPPELIN-5233]. Clear output before running paragraph
dfed9b8 is described below

commit dfed9b88b4117d2db754e5236d4a3af2d1e1dd75
Author: Jeff Zhang <zj...@apache.org>
AuthorDate: Wed Feb 3 14:06:44 2021 +0800

    [ZEPPELIN-5233]. Clear output before running paragraph
    
    ### What is this PR for?
    
    Trivial PR to clean output before running paragraph. setStatus will broadcast paragraph to frontend. That means the output in frontend will be cleaned before running
    
    ### What type of PR is it?
    [ Improvement ]
    
    ### Todos
    * [ ] - Task
    
    ### What is the Jira issue?
    * https://issues.apache.org/jira/browse/ZEPPELIN-5233
    
    ### How should this be tested?
    * Ci pass
    
    ### Screenshots (if appropriate)
    
    ### Questions:
    * Does the licenses files need update? No
    * Is there breaking changes for older versions? No
    * Does this needs documentation? No
    
    Author: Jeff Zhang <zj...@apache.org>
    
    Closes #4043 from zjffdu/ZEPPELIN-5233 and squashes the following commits:
    
    9d5abed6e [Jeff Zhang] [ZEPPELIN-5233]. Clear output before running paragraph
---
 .../src/main/java/org/apache/zeppelin/notebook/Paragraph.java        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java b/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
index d6f92a6..b3f1557 100644
--- a/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
+++ b/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
@@ -350,6 +350,11 @@ public class Paragraph extends JobWithProgressPoller<InterpreterResult> implemen
               = interpreterSetting.getConfig(interpreter.getClassName());
       mergeConfig(config);
 
+      // clear output
+      setResult(null);
+      cleanOutputBuffer();
+      cleanRuntimeInfos();
+
       setStatus(Status.PENDING);
 
       if (shouldSkipRunParagraph()) {