Summary:
1. Revert GroupMetadata.members to private
2. Add back a wrongly removed comment
3. In GroupMetadata.remove(), update supportedProtocols and awaitingJoinCallbackMembers, only when the remove succeeded
Reviewers: Jason Gustafson <jason@confluent.io>, Ismael Juma <ismael@juma.me.uk>, Sriharsha Chintalapani <sriharsha@apache.org>
We currently do a lot of bookkeeping for timeouts which is both error-prone and distracting. This patch adds a new `Timer` class to simplify this logic and control unnecessary calls to system time. In particular, this helps with nested timeout operations. The consumer has been updated to use the new class.
Reviewers: Ismael Juma <ismael@juma.me.uk>, Guozhang Wang <wangguoz@gmail.com>
Currently Fetcher.getTopicMetadata() will not include offline partitions. Thus
KafkaConsumer.partitionsFor(topic) will not return all partitions of a topic if
there if any partition of the topic is offline. This causes problem if user
tries to query the total number of partitions of the given topic.
Author: radai-rosenblatt <radai.rosenblatt@gmail.com>
Reviewers: Jason Gustafson <jason@confluent.io>, Rajini Sivaram <rajinisivaram@googlemail.com>
Closes#4679 from radai-rosenblatt/partition_shenanigans
1. In each iteration, decide if a task is processable if all of its partitions contains data, so it can decide which record to process next.
1.a Add one exception that, if the task indeed have data on some but not all of its partitions, we only consider as not processable for some finite round of iterations.
1.b Add a task-level metric to record whenever we are forced to process a task that is only "partially data available", since it may leads to non-determinism.
2. Break the main loop on put-raw-data and process-them. Since now not all data put into the queue would be processed completely within a single iteration.
3. NOTE that within an iteration, if a task has exhausted one of its queue it will still be processed, since we only update processable list once in each iteration, I'm improving on this on the follow-up part III PR.
4. Found and fixed a bug in metrics recording: the taskName and sensorName parameters were exchanged.
5. Optimized task stream time computation again since our current partition stream time reasoning has been simplified.
6. Added unit tests.
Reviewers: Matthias J. Sax <matthias@confluent.io>, John Roesler <vvcephei@users.noreply.github.com>, Bill Bejeck <bbejeck@gmail.com>
DLQ reporter does not get a `errorHandlingMetrics` object when created by the worker. This results in an NPE.
Signed-off-by: Arjun Satish <arjunconfluent.io>
*More detailed description of your change,
if necessary. The PR title and PR message become
the squashed commit message, so use a separate
comment to ping reviewers.*
*Summary of testing strategy (including rationale)
for the feature or bug fix. Unit and/or integration
tests are expected for any behaviour change and
system tests should be considered for larger changes.*
Author: Arjun Satish <arjun@confluent.io>
Reviewers: Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#5440 from wicknicks/KAFKA-7228
Fixed incorrect use of default timeout instead of the argument explicitly passed to `newClientRequest`.
Reviewers: Ron Dagostino <rndgstn@gmail.com>, Ismael Juma <ismael@juma.me.uk>
Co-authored-by: Mickael Maison <mickael.maison@gmail.com>
Co-authored-by: Simon Clark <simonc6r@gmail.com>
Reviewers: Sriharsha Chintalapani <sriharsha@apache.org>
The specific changes in this PR from the second PR include:
1. Changed the types of graph nodes to names conveying more context
2. Build the entire physical plan from the graph, after StreamsBuilder.build() is called.
Other changes are addressed directly as review comments on the PR.
Testing consists of using all existing streams tests to validate building the physical plan with graph
Reviewers: Matthias J. Sax <matthias@confluent.io>, John Roesler <vvcephei@users.noreply.github.com>, Guozhang Wang <wangguoz@gmail.com>
Use delivery timeout instead of retries when possible and remove various TODOs associated with completion of KIP-91.
Reviewers: Ismael Juma <ismael@juma.me.uk>, Guozhang Wang <wangguoz@gmail.com>
* new minimum is 0, just like window size
* refactor tests to use smaller segment sizes as well
Reviewers: Matthias J. Sax <matthias@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
By waiting until server1 has joined the ISR before shutting down server2
Rerun the test method many times after the code change, and there is no flakiness any more.
Author: Lucas Wang <luwang@linkedin.com>
Reviewers: Mayuresh Gharat <gharatmayuresh15@gmail.com>, Dong Lin <lindong28@gmail.com>
Closes#5387 from gitlw/fixing_flacky_logrecevorytest
1. When we reinitialize the state store due to no CHECKPOINT with EOS turned on, we should update the checkpoint to consumer.seekToBeginnning() / consumer.position() to avoid falling into endless iterations.
2. Fixed a few other logic bugs around needsInitializing and needsRestoring.
Reviewers: Jason Gustafson <jason@confluent.io>, Bill Bejeck <bbejeck@gmail.com>
KAFKA-6432: Make index lookup more cache friendly
For each topic-partition, Kafka broker maintains two indices: one for message offset, one for message timestamp. By default, a new index entry is appended to each index for every 4KB messages. The lookup of the indices is a simple binary search. The indices are mmaped files, and cached by Linux page cache.
Both consumer fetch and follower fetch have to do an offset lookup, before accessing the actual message data. The simple binary search algorithm used for looking up the index is not cache friendly, and may cause page faults even on high QPS topic-partitions.
In a normal Kafka broker, all the follower fetch requests, and most consumer fetch requests should only look up the last few entries of the index. We can make the index lookup more cache friendly, by searching in the last one or two pages of the index first.
Reviewers: Colin Patrick McCabe <colin@cmccabe.xyz>, Guozhang Wang <wangguoz@gmail.com>, Ted Yu <yuzhihong@gmail.com>, Ismael Juma <github@juma.me.uk>, Sriharsha Chintalapani <sriharsha@apache.org>
1. As titled and as described in comments.
2. Modified unit test slightly to insert for new keys in committed data to expose this issue.
Reviewers: Bill Bejeck <bill@confluent.io>, Matthias J. Sax <matthias@confluent.io>
This patch forces metadata update for consumers with pattern subscription at the beginning of rebalance (retry.backoff.ms is respected). This is to prevent such consumers from detecting subscription changes (e.g., new topic creation) independently and triggering multiple unnecessary rebalances. KAFKA-7126 contains detailed scenarios and rationale.
Author: Jon Lee <jonlee@linkedin.com>
Reviewers: Jason Gustafson <jason@confluent.io>, Ted Yu <yuzhihong@gmail.com>, Dong Lin <lindong28@gmail.com>
Closes#5408 from jonlee2/KAFKA-7126
This PR now justs removes the check in TaskPairs.hasNewPair that was causing the task assignment issue.
This was done as we need to further refine task assignment strategy and this approach needs to include the statefulness of tasks and is best done in one pass vs taking a "patchy" approach.
Updated current tests and ran locally
Reviewers: Matthias J. Sax <matthias@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
An untimely wakeup can cause ConsumerCoordinator.onJoinComplete to throw a WakeupException before completion. On the next poll(), it will be retried, but this leads to an underflow error because the buffer containing the assignment data will already have been advanced. The solution is to duplicate the buffer passed to onJoinComplete.
Reviewers: Konstantine Karantasis <konstantine@confluent.io>, Rajini Sivaram <rajinisivaram@googlemail.com>
ZooKeeper client from version 3.4.13 doesn't handle connections to localhost very well. If ZooKeeper is started on 127.0.0.1 on a machine that has both ipv4 and ipv6 and a client is created using localhost rather than the IP address in the connection string, ZooKeeper client attempts to connect to ipv4 or ipv6 randomly with a fixed one second backoff if connection fails. Use 127.0.0.1 instead of localhost in streams tests to avoid intermittent test failures due to ZK client connection timeouts if ipv6 is chosen in consecutive address selections. Also add note to upgrade docs for 2.0.0.
Reviewers: Ismael Juma <github@juma.me.uk>, Matthias J. Sax <matthias@confluent.io>
This has always been an issue, but the recent upgrade to ZooKeeper
3.4.13 means it is also an issue when an unresolvable ZK
address is used, causing some tests to leak threads.
The change in behaviour in ZK 3.4.13 is that no exception is thrown
from the ZooKeeper constructor in case of an unresolvable address.
Instead, ZooKeeper tries to re-resolve the address hoping it becomes
resolvable again. We eventually throw a
`ZooKeeperClientTimeoutException`, which is similar to the case
where the the address is resolvable but ZooKeeper is not
reachable.
Reviewers: Ismael Juma <ismael@juma.me.uk>
When there are many inactive partitions in the cluster, we observed constant churn of URP in the cluster even if follower can catch up with leader's byte-in-rate because leader broker frequently moves replicas of inactive partitions out of ISR. This PR mitigates this issue by not moving replica out of ISR if follower's LEO == leader's LEO.
Author: Zhanxiang (Patrick) Huang <hzxa21@hotmail.com>
Reviewers: Dong Lin <lindong28@gmail.com>
Closes#5412 from hzxa21/KAFKA-7152
After successful completion of KafkaProducer#close, it is possible that an application calls KafkaProducer#send. If the send is invoked for a topic for which we do not have any metadata, the producer will block until `max.block.ms` elapses - we do not expect to receive any metadata update in this case because Sender (and NetworkClient) has already exited. It is only when RecordAccumulator#append is invoked that we notice that the producer has already been closed and throw an exception. If `max.block.ms` is set to Long.MaxValue (or a sufficiently high value in general), the producer could block awaiting metadata indefinitely.
This patch makes sure `Metadata#awaitUpdate` periodically checks if the network client has been closed, and if so bails out as soon as possible.
And change KafkaController to use the newly introduced method.
Also remove redundant `InZk` postfixes from `registerBrokerInZk` and
`updateBrokerInfoInZk`.
As `checkedEphemeralCreate` is not used outside of `KafkaZkClient`
any longer, reduce its visibility.
ControllerIntegrationTest already covers this functionality well, it validates the
refactor.
Reviewers: Ismael Juma <ismael@juma.me.uk>
The log line says `ms`, but the actual value could represent a
different time unit depending on what the user provided.
Reviewers: Jason Gustafson <jason@confluent.io>, Ismael Juma <ismael@juma.me.uk>
Updated the 2.0 document for changed quota behaviors.
Author: Jon Lee <jonlee@linkedin.com>
Reviewers: Ismael Juma <ismael@juma.me.uk>, Dong Lin <lindong28@gmail.com>
Closes#5384 from jonlee2/KAFKA-7177
A recent change from `new FileOutputStream` to `Files.newOutputStream` missed the `CREATE` flag (which is necessary in addition to `APPEND`).
Reviewers: Ismael Juma <ismael@juma.me.uk>
In system tests, it is useful to have the thread dumps if a broker cannot be stopped using SIGTERM.
Reviewers: Xavier Léauté <xl+github@xvrl.net>, Ismael Juma <ismael@juma.me.uk>, Jason Gustafson <jason@confluent.io>
Currently, if a consumer group never commits offsets, ConsumerGroupCommand will not include it in the describe output even if the member assignment is valid. Instead, the tool should be able to describe the group information showing empty current_offset and LAG.
Reviewers: Sriharsha Chintalapani <sriharsha@apache.org>, Vahid Hashemian <vahidhashemian@us.ibm.com>, Jason Gustafson <jason@confluent.io>
SslTransportLayer currently closes the SSL engine and logs a warning if close_notify message canot be sent because the remote end closed its connection. This tends to fill up broker logs, especially when using clients which close connections immediately. Since this log entry is not very useful anyway, it would be better to log at debug level.
Reviewers: Jason Gustafson <jason@confluent.io>, Ismael Juma <ismael@juma.me.uk>
ying-zheng
Stanislav Kozlovski
Manikumar Reddy O
Colin Patrick McCabe
John Roesler
Jason Gustafson
radai-rosenblatt
Guozhang Wang
Matthias J. Sax
Arjun Satish
Simon Clark
Bill Bejeck
Lucas Wang
Lee Dongjin
Dhruvil Shah
Jon Lee
Yu Yang
Rajini Sivaram
Zhanxiang (Patrick) Huang
Sandor Murakozi
wangshao
Konstantine Karantasis
Arjun Satish
huxi