HyukjinKwon commented on a change in pull request #26239:
[SPARK-29582][PYSPARK] Support `TaskContext.get()` in a barrier task from
Python side
URL: https://github.com/apache/spark/pull/26239#discussion_r340936674
##########
File path: python/pyspark/tests/test_taskcontext.py
##########
@@ -181,6 +227,40 @@ def context_barrier(x):
for pid in pids:
self.assertTrue(pid in worker_pids)
+ def test_task_context_correct_with_python_worker_reuse(self):
+ """Verify the task context correct when reused python worker"""
+ # start a normal job first to start all workers and get all worker pids
+ worker_pids = self.sc.parallelize(xrange(2), 2).map(lambda x:
os.getpid()).collect()
+ # the worker will reuse in this barrier job
+ rdd = self.sc.parallelize(xrange(10), 2)
+
+ def context(iterator):
+ tp = TaskContext.get().partitionId()
+ try:
+ bp = BarrierTaskContext.get().partitionId()
+ except Exception:
+ bp = -1
+
+ yield (tp, bp, os.getpid())
+
+ def verify(result, task_context_target, barrier_context_target):
+ tps = list(map(lambda x: x[0], result))
+ bps = list(map(lambda x: x[1], result))
+ pids = list(map(lambda x: x[2], result))
Review comment:
BTW, iterable unpacking works with list(tuple) too
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