[GitHub] [zeppelin] zjffdu commented on a change in pull request #3696: [ZEPPELIN-4692]. zeppelin pyspark doesn't print java output

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zjffdu commented on a change in pull request #3696: [ZEPPELIN-4692]. zeppelin pyspark doesn't print java output
URL: https://github.com/apache/zeppelin/pull/3696#discussion_r399064011
 
 

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 File path: spark/interpreter/src/main/java/org/apache/zeppelin/spark/PySparkInterpreter.java
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 @@ -125,8 +127,18 @@ protected ZeppelinContext createZeppelinContext() {
   @Override
   public InterpreterResult interpret(String st, InterpreterContext context)
       throws InterpreterException {
-    Utils.printDeprecateMessage(sparkInterpreter.getSparkVersion(), context, properties);
-    return super.interpret(st, context);
+    // redirect java stdout/stdout to interpreter output. Because pyspark may call java code.
+    PrintStream originalStdout = System.out;
+    PrintStream originalStderr = System.err;
+    try {
+      System.setOut(new PrintStream(context.out));
+      System.setErr(new PrintStream(context.out));
+      Utils.printDeprecateMessage(sparkInterpreter.getSparkVersion(), context, properties);
+      return super.interpret(st, context);
 
 Review comment:
   They are here https://github.com/apache/zeppelin/blob/master/spark/interpreter/src/main/java/org/apache/zeppelin/spark/PySparkInterpreter.java#L133

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