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[SPARK-54551][CONNECT][TESTS] Fix random hangs in SparkConnectJdbcDataTypeSuite #53261

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[SPARK-54551][CONNECT][TESTS] Fix random hangs in SparkConnectJdbcDataTypeSuite #53261

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5 changes: 5 additions & 0 deletions ...nect/client/jvm/src/test/scala/org/apache/spark/sql/connect/test/RemoteSparkSession.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,11 @@ 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()
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