| Commit message (Collapse) | Author | Age | Files | Lines |
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Remove erroneous FAILED state for killed tasks.
Currently, when tasks are killed, the Executor first sends a
status update for the task with a "KILLED" state, and then
sends a second status update with a "FAILED" state saying that
the task failed due to an exception. The second FAILED state is
misleading/unncessary, and occurs due to a NonLocalReturnControl
Exception that gets thrown due to the way we kill tasks. This
commit eliminates that problem.
I'm not at all sure that this is the best way to fix this problem,
so alternate suggestions welcome. @rxin guessing you're the right
person to look at this.
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Currently, when tasks are killed, the Executor first sends a
status update for the task with a "KILLED" state, and then
sends a second status update with a "FAILED" state saying that
the task failed due to an exception. The second FAILED state is
misleading/unncessary, and occurs due to a NonLocalReturnControl
Exception that gets thrown due to the way we kill tasks. This
commit eliminates that problem.
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Improvements to DStream window ops and refactoring of Spark's CheckpointSuite
- Added a new RDD - PartitionerAwareUnionRDD. Using this RDD, one can take multiple RDDs partitioned by the same partitioner and unify them into a single RDD while preserving the partitioner. So m RDDs with p partitions each will be unified to a single RDD with p partitions and the same partitioner. The preferred location for each partition of the unified RDD will be the most common preferred location of the corresponding partitions of the parent RDDs. For example, location of partition 0 of the unified RDD will be where most of partition 0 of the parent RDDs are located.
- Improved the performance of DStream's reduceByKeyAndWindow and groupByKeyAndWindow. Both these operations work by doing per-batch reduceByKey/groupByKey and then using PartitionerAwareUnionRDD to union the RDDs across the window. This eliminates a shuffle related to the window operation, which can reduce batch processing time by 30-40% for simple workloads.
- Fixed bugs and simplified Spark's CheckpointSuite. Some of the tests were incorrect and unreliable. Added missing tests for ZippedRDD. I can go into greater detail if necessary.
- Added mapSideCombine option to combineByKeyAndWindow.
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CheckpointSuite to make the tests simpler and more reliable. Added missing test for ZippedRDD.
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Conflicts:
streaming/src/main/scala/org/apache/spark/streaming/dstream/WindowedDStream.scala
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This function was leftover from a while ago, and now just
passes all calls through to the abort() function, so this
commit deletes it.
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SPARK-991: Report information gleaned from a Python stacktrace in the UI
Scala:
- Added setCallSite/clearCallSite to SparkContext and JavaSparkContext.
These functions mutate a LocalProperty called "externalCallSite."
- Add a wrapper, getCallSite, that checks for an externalCallSite and, if
none is found, calls the usual Utils.formatSparkCallSite.
- Change everything that calls Utils.formatSparkCallSite to call
getCallSite instead. Except getCallSite.
- Add wrappers to setCallSite/clearCallSite wrappers to JavaSparkContext.
Python:
- Add a gruesome hack to rdd.py that inspects the traceback and guesses
what you want to see in the UI.
- Add a RAII wrapper around said gruesome hack that calls
setCallSite/clearCallSite as appropriate.
- Wire said RAII wrapper up around three calls into the Scala code.
I'm not sure that I hit all the spots with the RAII wrapper. I'm also
not sure that my gruesome hack does exactly what we want.
One could also approach this change by refactoring
runJob/submitJob/runApproximateJob to take a call site, then threading
that parameter through everything that needs to know it.
One might object to the pointless-looking wrappers in JavaSparkContext.
Unfortunately, I can't directly access the SparkContext from
Python---or, if I can, I don't know how---so I need to wrap everything
that matters in JavaSparkContext.
Conflicts:
core/src/main/scala/org/apache/spark/api/java/JavaSparkContext.scala
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Also replaced SparkConf.getOrElse with just a "get" that takes a default
value, and added getInt, getLong, etc to make code that uses this
simpler later on.
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Conflicts:
core/src/main/scala/org/apache/spark/SparkContext.scala
core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala
core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala
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Conflicts:
project/SparkBuild.scala
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Conflicts:
core/src/main/scala/org/apache/spark/rdd/CheckpointRDD.scala
streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobGenerator.scala
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Typesafe Config caches system properties the first time it's invoked
by default, ignoring later changes unless you do something special
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Conflicts:
core/src/main/scala/org/apache/spark/SparkContext.scala
core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
core/src/main/scala/org/apache/spark/scheduler/cluster/ClusterTaskSetManager.scala
core/src/main/scala/org/apache/spark/scheduler/local/LocalScheduler.scala
core/src/main/scala/org/apache/spark/util/MetadataCleaner.scala
core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala
core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
new-yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala
streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobGenerator.scala
streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
streaming/src/test/scala/org/apache/spark/streaming/InputStreamsSuite.scala
streaming/src/test/scala/org/apache/spark/streaming/TestSuiteBase.scala
streaming/src/test/scala/org/apache/spark/streaming/WindowOperationsSuite.scala
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sometimes be set that way (undoes a change in previous commit)
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- Got rid of global SparkContext.globalConf
- Pass SparkConf to serializers and compression codecs
- Made SparkConf public instead of private[spark]
- Improved API of SparkContext and SparkConf
- Switched executor environment vars to be passed through SparkConf
- Fixed some places that were still using system properties
- Fixed some tests, though others are still failing
This still fails several tests in core, repl and streaming, likely due
to properties not being set or cleared correctly (some of the tests run
fine in isolation).
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given what they are testing.
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Conflicts:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobGenerator.scala
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Approximate distinct count
Added countApproxDistinct() to RDD and countApproxDistinctByKey() to PairRDDFunctions to approximately count distinct number of elements and distinct number of values per key, respectively. Both functions use HyperLogLog from stream-lib for counting. Both functions take a parameter that controls the trade-off between accuracy and memory consumption. Also added Scala docs and test suites for both methods.
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