vinodkc commented on code in PR #53275:
URL: https://github.com/apache/spark/pull/53275#discussion_r2579678925


##########
sql/connect/client/jvm/src/test/scala/org/apache/spark/sql/connect/test/RemoteSparkSession.scala:
##########
@@ -93,21 +94,47 @@ object SparkConnectServerUtils {
     if (isDebug) {
       builder.redirectError(Redirect.INHERIT)
       builder.redirectOutput(Redirect.INHERIT)
-    } else {
-      // If output is not consumed, the stdout/stderr pipe buffers will fill 
up,
-      // causing the server process to block on write() calls
-      builder.redirectError(Redirect.DISCARD)
-      builder.redirectOutput(Redirect.DISCARD)
     }
 
     val process = builder.start()
     consoleOut = process.getOutputStream
 
+    if (!isDebug) {

Review Comment:
   When debug `ON`, it is already redirected to ./target/unit-tests.log. Only 
when debug `OFF` do we not get the log4j conf; in that case, we preserve the 
logs in `./sql/connect/client/jvm/target/spark-connect-test-server-*.log`.
   Do you suggest redirecting to 
./sql/connect/client/jvm/target/spark-connect-test-server-*.log on debug `ON` 
as well? 



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