vanzin commented on a change in pull request #23156: [SPARK-24063][SS] Add
maximum epoch queue threshold for ContinuousExecution
URL: https://github.com/apache/spark/pull/23156#discussion_r259953655
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -1413,6 +1413,14 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val CONTINUOUS_STREAMING_EPOCH_BACKLOG_QUEUE_SIZE =
+ buildConf("spark.sql.streaming.continuous.epochBacklogQueueSize")
+ .internal()
+ .doc("The max number of entries to be stored in queue to wait for late
epochs. " +
+ "If this parameter is exceeded by the size of the queue, stream will
stop with an error.")
+ .intConf
+ .createWithDefault(10000)
Review comment:
e.g. you could leave it at `Int.MaxValue` to avoid breaking existing apps,
but add a warning that this configuration can lead to OOM errors that are hard
to debug.
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