Implementation of [KIP-174](https://cwiki.apache.org/confluence/display/KAFKA/KIP-174+-+Deprecate+and+remove+internal+converter+configs+in+WorkerConfig)
Configuration properties 'internal.key.converter' and 'internal.value.converter'
are deprecated, and default to org.apache.kafka.connect.json.JsonConverter.
Warnings are logged if values are specified for either, or if properties that
appear to configure instances of internal converters (i.e., ones prefixed with
either 'internal.key.converter.' or 'internal.value.converter.') are given.
The property 'schemas.enable' is also defaulted to false for internal
JsonConverter instances (both for keys and values) if it isn't specified.
Documentation and code have also been updated with deprecation notices and
annotations, respectively.
Unit tests have been updated in `PluginsTest` to account for the new defaults for `schemas.enable` for internal key/value converters, and to ensure that (for the time being), internal key/value converters are still configurable despite being deprecated.
Author: Chris Egerton <chrise@confluent.io>
Author: Ewen Cheslack-Postava <me@ewencp.org>
Reviewers: Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4693 from C0urante/kafka-5540
Refresh metadata if broker connection fails so that new calls are sent only to nodes that are alive and requests to controller are sent to the new controller if controller changes due to broker failure. Also reassign calls that could not be sent.
Reviewers: Dong Lin <lindong28@gmail.com>, Jason Gustafson <jason@confluent.io>
KAFKA-6921 removed deprecated scala producer. This pull request removes the now unnecessary findbugs exclusion that matched one of the affected classes.
Document cases where `IllegalStateException` is raised when attempting an invalid operation on an unassigned partition. Also change `position()` to raise `IllegalStateException` when called on an unassigned partition for consistency.
No longer needed since we dropped support for Java 7.
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Dong Lin <lindong28@gmail.com>
Closes#5083 from ijuma/remove-max-perm-size
Add the new stricter-timeout version of `poll` proposed in KIP-266.
The pre-existing variant `poll(long timeout)` would block indefinitely for metadata
updates if they were needed, then it would issue a fetch and poll for `timeout` ms
for new records. The initial indefinite metadata block caused applications to become
stuck when the brokers became unavailable. The existence of the timeout parameter
made the indefinite block especially unintuitive.
This PR adds `poll(Duration timeout)` with the semantics:
1. iff a metadata update is needed:
1. send (asynchronous) metadata requests
2. poll for metadata responses (counts against timeout)
- if no response within timeout, **return an empty collection immediately**
2. if there is fetch data available, **return it immediately**
3. if there is no fetch request in flight, send fetch requests
4. poll for fetch responses (counts against timeout)
- if no response within timeout, **return an empty collection** (leaving async fetch request for the next poll)
- if we get a response, **return the response**
The old method, `poll(long timeout)` is deprecated, but we do not change its semantics, so it remains:
1. iff a metadata update is needed:
1. send (asynchronous) metadata requests
2. poll for metadata responses *indefinitely until we get it*
2. if there is fetch data available, **return it immediately**
3. if there is no fetch request in flight, send fetch requests
4. poll for fetch responses (counts against timeout)
- if no response within timeout, **return an empty collection** (leaving async fetch request for the next poll)
- if we get a response, **return the response**
One notable usage is prohibited by the new `poll`: previously, you could call `poll(0)` to block for metadata updates, for example to initialize the client, supposedly without fetching records. Note, though, that this behavior is not according to any contract, and there is no guarantee that `poll(0)` won't return records the first time it's called. Therefore, it has always been unsafe to ignore the response.
This KIP adds the following functionality related to SASL/OAUTHBEARER:
1) Allow clients (both brokers when SASL/OAUTHBEARER is the inter-broker protocol as well as non-broker clients) to flexibly retrieve an access token from an OAuth 2 authorization server based on the declaration of a custom login CallbackHandler implementation and have that access token transparently and automatically transmitted to a broker for authentication.
2) Allow brokers to flexibly validate provided access tokens when a client establishes a connection based on the declaration of a custom SASL Server CallbackHandler implementation.
3) Provide implementations of the above retrieval and validation features based on an unsecured JSON Web Token that function out-of-the-box with minimal configuration required (i.e. implementations of the two types of callback handlers mentioned above will be used by default with no need to explicitly declare them).
4) Allow clients (both brokers when SASL/OAUTHBEARER is the inter-broker protocol as well as non-broker clients) to transparently retrieve a new access token in the background before the existing access token expires in case the client has to open new connections.
AdminClient should backoff when retrying a Call. Fixed and added a unit test
Author: Jason Gustafson <jason@confluent.io>
Reviewers: Dong Lin <lindong28@gmail.com>
Closes#5077 from hachikuji/admin-client-retry-backoff
consumer offset path in zookeeper should be /consumers/${group}/offsets/${topic}/${partition} instead of /consumers/${group}/offset/${topic}/${partition}. Added `s` to the word `offset`.
Reviewers: Ismael Juma <ismael@juma.me.uk>, Manikumar Reddy O <manikumar.reddy@gmail.com>, Jun Rao <junrao@gmail.com>
When any metric (e.g. per-partition metric) is created or deleted,
registerMBean() is called which in turn calls getMBeanInfo().getClassName().
However, KafkaMbean.getMBeanInfo() instantiates an array of all sensors even
though we only need the class name. This costs a lot of CPU to register
sensors when consumer with large partition assignment starts. For example, it
takes 5 minutes to start a consumer with 35k partitions. This patch reduces the
consumer startup time seconds.
Author: radai-rosenblatt <radai.rosenblatt@gmail.com>
Reviewers: Satish Duggana <satish.duggana@gmail.com>, Dong Lin <lindong28@gmail.com>
Closes#5011 from radai-rosenblatt/fun-with-jmx
The Signal classes are not available in the compile classpath
if --release is used so we use reflection as a workaround.
As part of that moved the code to Java and added a simple
unit test.
Also disabled the signal handler if the IBM JDK is being used
due to KAFKA-6918.
Manually tested shutdown via ctrl+c and verified that
the message is printed.
* Removed Scala producers, request classes, kafka.tools.ProducerPerformance, encoders,
tests.
* Updated ConsoleProducer to remove Scala producer support (removed `BaseProducer`
and several options that are not used by the Java producer).
* Updated a few Scala consumer tests to use the new producer (including a minor
refactor of `produceMessages` methods in `TestUtils`).
* Updated `ClientUtils.fetchTopicMetadata` to use `SimpleConsumer` instead of
`SyncProducer`.
* Removed `TestKafkaAppender` as it looks useless and it defined an `Encoder`.
* Minor import clean-ups
No new tests added since behaviour should remain the same after these changes.
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Manikumar Reddy O <manikumar.reddy@gmail.com>, Dong Lin <lindong28@gmail.com>
Closes#5045 from ijuma/kafka-6921-remove-old-producer
Fix the check, add unit test to verify the change, update `DynamicBrokerReconfigurationTest` to avoid dynamic keystore update in tests which are not expected to update keystores.
Avoid dependence on the internal __consumer_offsets topic to handle `listConsumerGroups()` since it unnecessarily requires users to have Describe access on an internal topic. Instead we query each broker independently. For most clusters, this amounts to the same thing since the default number of partitions for __consumer_offsets is 50. This also provides better encapsulation since it avoids exposing the use of __consumer_offsets, which gives us more flexibility in the future.
Author: Jason Gustafson <jason@confluent.io>
Reviewers: Dong Lin <lindong28@gmail.com>
Closes#5007 from hachikuji/remove-admin-use-of-offsets-topic
Little back story on this. Was helping a user over email. This could be much easier to debug if we assume that the connector developer might not return valid configs. For example Intellij will generate a stub that returns a null. This was the case that inspired this JIRA.
Author: Jeremy Custenborder <jcustenborder@gmail.com>
Reviewers: Jason Gustafson <jason@confluent.io>, Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3762 from jcustenborder/KAFKA-5807
These constructors should be public to allow users to write test cases using them. We follow a similar pattern for the other domain objects that we expose in `AdminClient` (e.g. `TopicDescription`).
Reviewers: Ismael Juma <ismael@juma.me.uk>
If the internal metadata request fails, we must reset the state inside `AdminClientMetadataManager` or we will be stuck indefinitely in the `UPDATE_PENDING` state and have no way to fetch new metadata.
Author: Jason Gustafson <jason@confluent.io>
Reviewers: Dong Lin <lindong28@gmail.com>
Closes#5057 from hachikuji/fix-admin-client-metadata-update-failure
We no longer need them since we now require Java 8.
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Andras Beni <andrasbeni@cloudera.com>, Manikumar Reddy O <manikumar.reddy@gmail.com>, Dong Lin <lindong28@gmail.com>
Closes#5049 from ijuma/remove-base64
* Set --source, --target and --release to 1.8.
* Build Scala 2.12 by default.
* Remove some conditionals in the build file now that Java 8
is the minimum version.
* Bump the version of Jetty, Jersey and Checkstyle (the newer
versions require Java 8).
* Fixed issues uncovered by the new version if Checkstyle.
* A couple of minor updates to handle an incompatible source
change in the new version of Jetty.
* Add dependency to jersey-hk2 to fix failing tests caused
by Jersey upgrade.
* Update release script to use Java 8 and to take into account
that Scala 2.12 is now built by default.
* While we're at it, bump the version of Gradle, Gradle plugins,
ScalaLogging, JMH and apache directory api.
* Minor documentation updates including the readme and upgrade
notes. A number of Streams Java 7 examples can be removed
subsequently.
https://issues.apache.org/jira/browse/KAFKA-6685
Added Exception message in `WorkerSinkTask.convertMessages` to distinguish message Key from Value during deserialization to Kafka connect format.
*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: Jagadesh Adireddi <adireddijagadesh@gmail.com>
Reviewers: Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4765 from jadireddi/KAFKA-6685---log-message-should-distinguish-key-from-value
test_broker_type_bounce_at_start tries to validate that when the controller is down, the streams client will always fail trying to create the topic; with the current behavior of admin client it is actually not always true: the actual behavior depends on the admin client internals as well as when the controller becomes unavailable during the leader assign partitions phase. I'd suggest at least ignore this test for now until the admin client has more stable (personally I'd even suggest removing this test as its coverage benefits is smaller than its introduced issues to me).
Also adding a few more log4j entries as a result of investigating this issue.
Reviewers: Matthias J. Sax <matthias@confluent.io>
Due to #4644 the consumer connector logs will be much more clean with fewer "broker may not be available" entries. We need to reduce the required frequency from 100 to a smaller number.
I've thought about reducing to just 1, but it may still be transient (i.e. even if broker is starting up you may see a few entries) so I reduced it to 10.
Reviewers: Bill Bejeck <bill@confluent.io>, Matthias J. Sax <matthias@confluent.io>
* The consumer groups API should expose group state and coordinator information. This information is needed by administrative tools and scripts that access consume groups.
* The partition assignment will be empty when the group is rebalancing. Fix an issue where the adminclient attempted to deserialize this empty buffer.
* Remove nulls from the API and make all collections immutable.
* DescribeConsumerGroupsResult#all should return a result as expected, rather than Void
* Fix exception text for GroupIdNotFoundException, GroupNotEmptyException. It was being filled in as "The group id The group id does not exist was not found" and similar.
Reviewers: Attila Sasvari <asasvari@apache.org>, Andras Beni <andrasbeni@cloudera.com>, Dong Lin <lindong28@gmail.com>, Jason Gustafson <jason@confluent.io>
The type inference doesn't currently work for the join functions in Scala as it doesn't know yet the types of the given KStream[K, V] or KTable[K, V].
The fix here is to curry the joiner function. I personally prefer this notation but this also means it differs more from the Java API.
I believe the diff with the Java API is worth in this case as it's not only solving the type inference but also fits better the Scala way of coding (ex: fold).
Moreover any Scala dev will bug and spend little time on these functions trying to understand why the type inference is not working and then get frustrated to be obliged to be explicit here where it's not harmful to be inferred.
Reviewers: Debasish Ghosh <dghosh@acm.org>, Guozhang Wang <guozhang@confluent.io>, Ismael Juma <ismael@juma.me.uk>
This is a follow-up to #5022 which added documentation to the Processor
interface. This commit adds similar documentation to Transformer and
ValueTransformer.
Also, s/processor/transformer/ in the close() docs.
Reviewers: Matthias J. Sax <matthias@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
This is a change to improve resource cleanup for sink tasks and source tasks. Now `Task.stop()` is called from both `WorkerSinkTask.close()` and `WorkerSourceTask.close()`.
It is called from `WorkerXXXTask.close()` since this method is called in the `finally` block of `WorkerTask.run()`, and Connect developers use `stop()` to clean up resources.
Author: Robert Yokota <rayokota@gmail.com>
Reviewers: Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#5020 from rayokota/K6566-improve-connect-resource-cleanup
The wakeup-based strategy caused more problems than it
solved, so we'll instead focus on KIP-266.
Revert commit 2d8049b.
Keep the metrics addition and the new test util.
Also keep the tests for shutdown, although they must be ignored until
poll(Duration) is done in the scope of KIP-266.
Reviewers: Guozhang Wang <wangguoz@gmail.com>
1. In InternalTopologyBuilder#topicGroups, which is used in StreamsPartitionAssignor, look for book-kept storeToChangelogTopic map before creating a new internal changelog topics. In this way if the source KTable is created, its source topic stored in storeToChangelogTopic will be used.
2. Added unit test (confirmed that without 1) it will fail).
3. MINOR: removed TODOs that are related to removed KStreamBuilder.
4. MINOR: removed TODOs in StreamsBuilderTest util functions and replaced with TopologyWrapper.
5. MINOR: removed StreamsBuilderTest#testFrom as it is already covered by TopologyTest#shouldNotAllowToAddSourcesWithSameName, plus it requires KStreamImpl.SOURCE_NAME which should be a package private field of the KStreamImpl.
Reviewers: John Roesler <john@confluent.io>, Bill Bejeck <bill@confluent.io>, Matthias
J. Sax <matthias@confluent.io>
We would like to also export the producer metrics from StreamThread just like consumer metrics, so that we could gain more visibility of stream application. The approach is to pass in the threadProducer into the StreamThread so that we could export its metrics in dynamic.
Note that this is a pure internal change that doesn't require a KIP, and in the future we also want to export admin client metrics. A followup KIP for admin client will be created once this is merged.
Reviewers: Guozhang Wang <wangguoz@gmail.com>
Bill Bejeck
Chris Egerton
Rajini Sivaram
Andras Beni
Manikumar Reddy O
Ismael Juma
John Roesler
Chia-Ping Tsai
Ron Dagostino
Jason Gustafson
maytals
yaphet
Jun Rao
Radai Rosenblatt
Sasaki Toru
Jorge Quilcate Otoya
Jeremy Custenborder
Filipe Agapito
Jagadesh Adireddi
Guozhang Wang
Colin Patrick McCabe
Joan Goyeau
David Glasser
Andy Coates
Robert Yokota
Matthias J. Sax
Boyang Chen