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Posted to commits@kafka.apache.org by jg...@apache.org on 2019/06/08 00:06:32 UTC
[kafka] branch 2.2 updated (ed47e09 -> 91d229d)
This is an automated email from the ASF dual-hosted git repository.
jgus pushed a change to branch 2.2
in repository https://gitbox.apache.org/repos/asf/kafka.git.
from ed47e09 KAFKA-8499: ensure java is in PATH for ducker system tests (#6898)
new be1bfad MINOR: Lower producer throughput in flaky upgrade system test
new 91d229d MINOR: Fix race condition on shutdown of verifiable producer
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Summary of changes:
tests/kafkatest/services/verifiable_producer.py | 6 +++++-
tests/kafkatest/tests/core/upgrade_test.py | 2 +-
2 files changed, 6 insertions(+), 2 deletions(-)
[kafka] 02/02: MINOR: Fix race condition on shutdown of verifiable
producer
Posted by jg...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
jgus pushed a commit to branch 2.2
in repository https://gitbox.apache.org/repos/asf/kafka.git
commit 91d229df6011045f92734c3e059888a3d60eb47e
Author: Jason Gustafson <ja...@confluent.io>
AuthorDate: Fri Jun 7 16:56:21 2019 -0700
MINOR: Fix race condition on shutdown of verifiable producer
We've seen `ReplicaVerificationToolTest.test_replica_lags` fail occasionally due to errors such as the following:
```
RemoteCommandError: ubuntuworker7: Command 'kill -15 2896' returned non-zero exit status 1. Remote error message: bash: line 0: kill: (2896) - No such process
```
The problem seems to be a shutdown race condition when using `max_messages` with the producer. The process may already be gone which will cause the signal to fail.
Author: Jason Gustafson <ja...@confluent.io>
Reviewers: Gwen Shapira
Closes #6906 from hachikuji/fix-failing-replicat-verification-test
---
tests/kafkatest/services/verifiable_producer.py | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tests/kafkatest/services/verifiable_producer.py b/tests/kafkatest/services/verifiable_producer.py
index 3322d16..893baa4 100644
--- a/tests/kafkatest/services/verifiable_producer.py
+++ b/tests/kafkatest/services/verifiable_producer.py
@@ -278,7 +278,11 @@ class VerifiableProducer(KafkaPathResolverMixin, VerifiableClientMixin, Backgrou
return True
def stop_node(self, node):
- self.kill_node(node, clean_shutdown=True, allow_fail=False)
+ # There is a race condition on shutdown if using `max_messages` since the
+ # VerifiableProducer will shutdown automatically when all messages have been
+ # written. In this case, the process will be gone and the signal will fail.
+ allow_fail = self.max_messages > 0
+ self.kill_node(node, clean_shutdown=True, allow_fail=allow_fail)
stopped = self.wait_node(node, timeout_sec=self.stop_timeout_sec)
assert stopped, "Node %s: did not stop within the specified timeout of %s seconds" % \
[kafka] 01/02: MINOR: Lower producer throughput in flaky upgrade
system test
Posted by jg...@apache.org.
This is an automated email from the ASF dual-hosted git repository.
jgus pushed a commit to branch 2.2
in repository https://gitbox.apache.org/repos/asf/kafka.git
commit be1bfadde71b884d57511a6a289c02855e493762
Author: Jason Gustafson <ja...@confluent.io>
AuthorDate: Fri Jun 7 16:53:50 2019 -0700
MINOR: Lower producer throughput in flaky upgrade system test
We see the upgrade test failing from time to time. I looked into it and found that the root cause is basically that the test throughput can be too high for the 0.9 producer to make progress. Eventually it reaches a point where it has a huge backlog of timed out requests in the accumulator which all have to be expired. We see a long run of messages like this in the output:
```
{"exception":"class org.apache.kafka.common.errors.TimeoutException","time_ms":1559907386132,"name":"producer_send_error","topic":"test_topic","message":"Batch Expired","class":"class org.apache.kafka.tools.VerifiableProducer","value":"335160","key":null}
{"exception":"class org.apache.kafka.common.errors.TimeoutException","time_ms":1559907386132,"name":"producer_send_error","topic":"test_topic","message":"Batch Expired","class":"class org.apache.kafka.tools.VerifiableProducer","value":"335163","key":null}
{"exception":"class org.apache.kafka.common.errors.TimeoutException","time_ms":1559907386133,"name":"producer_send_error","topic":"test_topic","message":"Batch Expired","class":"class org.apache.kafka.tools.VerifiableProducer","value":"335166","key":null}
{"exception":"class org.apache.kafka.common.errors.TimeoutException","time_ms":1559907386133,"name":"producer_send_error","topic":"test_topic","message":"Batch Expired","class":"class org.apache.kafka.tools.VerifiableProducer","value":"335169","key":null}
```
This can continue for a long time (I have observed up to 1 min) and prevents the producer from successfully writing any new data. While it is busy expiring the batches, no data is getting delivered to the consumer, which causes it to eventually raise a timeout.
```
kafka.consumer.ConsumerTimeoutException
at kafka.consumer.NewShinyConsumer.receive(BaseConsumer.scala:50)
at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:109)
at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:69)
at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:47)
at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
```
The fix here is to reduce the throughput, which seems reasonable since the purpose of the test is to verify the upgrade, which does not demand heavy load. Note that I investigated several failing instances of this test going back to 1.0 and saw a similar pattern, so there does not appear to be a regression.
Author: Jason Gustafson <ja...@confluent.io>
Reviewers: Gwen Shapira
Closes #6907 from hachikuji/lower-throughput-for-upgrade-test
---
tests/kafkatest/tests/core/upgrade_test.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tests/kafkatest/tests/core/upgrade_test.py b/tests/kafkatest/tests/core/upgrade_test.py
index c9236ee..bfbb5b3 100644
--- a/tests/kafkatest/tests/core/upgrade_test.py
+++ b/tests/kafkatest/tests/core/upgrade_test.py
@@ -36,7 +36,7 @@ class TestUpgrade(ProduceConsumeValidateTest):
self.zk.start()
# Producer and consumer
- self.producer_throughput = 10000
+ self.producer_throughput = 1000
self.num_producers = 1
self.num_consumers = 1