`loadClass` needs to be synchronized to protect subsequent calls to `defineClass`.
Details in the javadoc of this PR as well as here too: https://docs.oracle.com/javase/7/docs/technotes/guides/lang/cl-mt.html
/cc ewencp rhauch
Author: Konstantine Karantasis <konstantine@confluent.io>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4428 from kkonstantine/KAFKA-6277-Make-loadClass-thread-safe-for-class-loaders-of-Connect-plugins
Making clear that implementations of poll() shouldn't block indefinitely in order to allow the task instance to transition to PAUSED state.
Reviewers: Randall Hauch <rhauch@gmail.com>, Jason Gustafson <jason@confluent.io>
When using Kafka Connect with a cluster that doesn't allow the user to
create topics (due to ACL configuration), Connect fails when trying to
create its internal topics even if these topics already exist. This is
incorrect behavior according to the documentation, which mentions that
R/W access should be enough.
This happens specifically when using Aiven Kafka, which does not permit
creation of topics via the Kafka Admin Client API.
The patch ignores the returned error, similar to the behavior for older
brokers that don't support the API.
* Implement MockAdminClient.deleteTopics
* Use MockAdminClient instead of MockKafkaAdminClientEnv in StreamsResetterTest
* Rename MockKafkaAdminClientEnv to AdminClientUnitTestEnv
* Use MockAdminClient instead of MockKafkaAdminClientEnv in TopicAdminTest
* Rename KafkaAdminClient to AdminClientUnitTestEnv in KafkaAdminClientTest.java
* Migrate StreamThreadTest to MockAdminClient
* Fix style errors
* Address review comments
* Fix MockAdminClient call
Reviewers: Matthias J. Sax <matthias@confluent.io>, Konstantine Karantasis <konstantine@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
We are closing the metricGroups created in a Worker, Source task and Sink task before populating them with new metrics. This helps in cases where an Exception is thrown when previously created groups were not cleaned up correctly.
Signed-off-by: Arjun Satish <arjunconfluent.io>
Author: Arjun Satish <arjun@confluent.io>
Reviewers: Randall Hauch <rhauch@gmail.com>, Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4397 from wicknicks/KAFKA-6252
When the source file of `FileStreamSource` is a large file, `FileStreamSourceTask.poll()` will result in OOM. This pull request added `batch.size` parameter which can restrict the poll size.
*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: Study <ph.study@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4356 from phstudy/KAFKA-4335
This changes the Struct's equals and hashCode method to use Arrays#deepEquals and Arrays#deepHashCode, respectively. This resolves a problem where two structs with values of type byte[] would not be considered equal even though the byte arrays' contents are equal. By using deepEquals, the byte arrays' contents are compared instead of ther identity.
Since this changes the behavior of the equals method for byte array values, the behavior of hashCode must change alongside it to ensure the methods still fulfill the general contract of "equal objects must have equal hashCodes".
Test rationale:
All existing unit tests for equals were untouched and continue to work. A new test method was added to verify the behavior of equals and hashCode for Struct instances that contain a byte array value. I verify the reflixivity and transitivity of equals as well as the fact that equal Structs have equal hashCodes
and not-equal structs do not have equal hashCodes.
Author: Tobias Gies <tobias.gies@trivago.com>
Author: Tobias Gies <tobias@tobiasgies.de>
Reviewers: Randall Hauch <rhauch@gmail.com>, Jason Gustafson <jason@confluent.io>
Closes#4293 from tobiasgies/feature/kafka-6308-deepequals
Author: Colin P. Mccabe <cmccabe@confluent.io>
Reviewers: Randall Hauch <rhauch@gmail.com>, Jason Gustafson <jason@confluent.io>
Closes#4105 from cmccabe/KAFKA-6102
…from config to own function and added check to create connector call.
Author: Soenke Liebau <soenke.liebau@opencore.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4230 from soenkeliebau/KAFKA-5563
There are more methods that had to be touched than I anticipated when writing [the KIP](https://cwiki.apache.org/confluence/display/KAFKA/KIP-215%3A+Add+topic+regex+support+for+Connect+sinks).
The implementation here is now complete and includes a test that verifies that there's a call to `consumer.subscribe(Pattern, RebalanceHandler)` when `topics.regex` is provided.
Author: Jeff Klukas <jeff@klukas.net>
Reviewers: Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4151 from jklukas/connect-topics.regex
Re-arrange order of comparisons in equals() to evaluate non-composite fields first
Cache hash code
Author: tedyu <yuzhihong@gmail.com>
Reviewers: Randall Hauch <rhauch@gmail.com>, Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4176 from tedyu/trunk
The ConnectExceptionMapper was originally intended to handle ConnectException errors for some expected cases where we just want to always convert them to a certain response and the ExceptionMapper was the easiest way to do that uniformly across the API. However, in the case that it's not an expected subclass, we should log the information at the error level so the user can track down the cause of the error.
This is only an initial improvement. We should probably also add a more general ExceptionMapper to handle other exceptions we may not have caught and converted to ConnectException.
Author: Ewen Cheslack-Postava <me@ewencp.org>
Reviewers: Randall Hauch <rhauch@gmail.com>, Jason Gustafson <jason@confluent.io>
Closes#4227 from ewencp/better-connect-error-logging
Changed the condition in **if** statement
**(schema.name() == null || !(schema.name().equals(LOGICAL_NAME)))** which
requires two comparisons in worst case with
**(!LOGICAL_NAME.equals(schema.name()))** which requires single comparison
in all cases and _avoids null pointer exception.
_
Author: sachinbhalekar <sachinbansibhalekar@gmail.com>
Author: sachinbhalekar <32234013+sachinbhalekar@users.noreply.github.com>
Reviewers: Randall Hauch <rhauch@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4225 from sachinbhalekar/trunk
Author: Richard Yu <richardyu@Richards-Air.attlocal.net>
Reviewers: Jason Gustafson <jason@confluent.io>
Closes#4110 from ConcurrencyPractitioner/trunk
Added metrics to the Connect worker and rebalancing metrics to the distributed herder.
This is built on top of #3987, and I can rebase this PR once that is merged.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#4011 from rhauch/kafka-5903
A new mechanism was added recently to the Metrics framework to make it easier to generate the documentation. It uses a registry with a MetricsNameTemplate for each metric, and then those templates are used when creating the actual metrics. The metrics framework provides utilities that can generate the HTML documentation from the registry of templates.
This change moves the recently-added Connect metrics over to use these templates and to then generate the metric documentation for Connect.
This PR is based upon #3975 and can be rebased once that has been merged.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3987 from rhauch/kafka-5990
- Simplify LogCleaner.cleanSegments and add comment regarding thread
unsafe usage of `LogSegment.append`. This was a result of investigating
KAFKA-4972.
- Fix compiler warnings (in some cases use the fully qualified name as a
workaround for deprecation warnings in import statements).
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Rajini Sivaram <rajinisivaram@googlemail.com>
Closes#4016 from ijuma/simplify-log-cleaner-and-fix-warnings
Added Connect metrics specific to source tasks, and builds upon #3864 and #3911 that have already been merged into `trunk`, and #3959 that has yet to be merged.
I'll rebase this PR when the latter is merged.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3975 from rhauch/kafka-5902
Adds new metrics to support health checks:
1. Error rates for each request type, per-error code
2. Request size and temporary memory size
3. Message conversion rate and time
4. Successful and failed authentication rates
5. ZooKeeper latency and status
6. Client version
Author: Rajini Sivaram <rajinisivaram@googlemail.com>
Reviewers: Ismael Juma <ismael@juma.me.uk>
Closes#3705 from rajinisivaram/KAFKA-5746-new-metrics
Added Connect metrics specific to source tasks, and builds upon #3864 and #3911 that have already been merged into `trunk`.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: tedyu <yuzhihong@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3959 from rhauch/kafka-5901
Added metrics that are common to both sink and source tasks.
Marked as "**WIP**" since this PR is built upon #3864, and will need to be rebased once that has been merged into `trunk`. However, I would still appreciate initial reviews since this PR is largely additive.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3911 from rhauch/kafka-5900
This PR is the first of several subtasks for [KAFKA-2376](https://issues.apache.org/jira/browse/KAFKA-2376) to add metrics to Connect worker processes. See that issue and [KIP-196 for details](https://cwiki.apache.org/confluence/display/KAFKA/KIP-196%3A+Add+metrics+to+Kafka+Connect+framework).
This PR adds metrics for each connector using Kafka’s existing `Metrics` framework. This is the first of several changes to add several groups of metrics, this change starts by adding a very simple `ConnectMetrics` object that is owned by each worker and that makes it easy to define multiple groups of metrics, called `ConnectMetricGroup` objects. Each metric group maps to a JMX MBean, and each metric within the group maps to an MBean attribute.
Future PRs will build upon this simple pattern to add metrics for source and sink tasks, workers, and worker rebalances.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewencp@confluent.io>
Closes#3864 from rhauch/kafka-5899
Embed the type of connector in ConnectorInfo
Author: tedyu <yuzhihong@gmail.com>
Reviewers: Randall Hauch <rhauch@gmail.com>, Jason Gustafson <jason@confluent.io>, Konstantine Karantasis <konstantine@confluent.io>, Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3812 from tedyu/trunk
Also:
1. Fix WorkerTest to use the correct `Mock` annotations. `org.easymock.Mock`
is not supported by PowerMock 2.x.
2. Rename `powermock` to `powermockJunit4` in `dependencies.gradle` for
clarity.
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Rajini Sivaram <rajinisivaram@googlemail.com>
Closes#3881 from ijuma/kafka-5884-powermock-java
- EasyMock 3.5 supports Java 9.
- Fixed issues in `testFailedSendRetryLogic` and
`testCreateConnectorAlreadyExists` exposed by new EasyMock
version. The former was passing `anyObject` to
`andReturn`, which doesn't make sense. This was leaving
behind a global `any` matcher, which caused a few issues in
the new version. Fixing this meant that the correlation ids had
to be updated to actually match. The latter was missing a
couple of expectations that the previous version of EasyMock
didn't catch.
- Removed unnecessary PowerMock dependency from 3 tests.
- Disabled remaining PowerMock tests when running with Java 9
until https://github.com/powermock/powermock/issues/783 is
in a release.
- Once we merge this PR, we can enable tests in the Java 9 builds
in Jenkins.
Author: Ismael Juma <ismael@juma.me.uk>
Reviewers: Rajini Sivaram <rajinisivaram@googlemail.com>
Closes#3845 from ijuma/kafka-4501-easymock-powermock-java-9
This patch ensures that the consumer groupId and clientId are available in all log messages which makes debugging much easier when a single application has multiple consumer instances. To make this easier, I've added a new `LogContext` object which builds a log prefix similar to the broker-side `kafka.utils.Logging` mixin. Additionally this patch changes the log level for a couple minor cases:
- Consumer wakeup events are now logged at DEBUG instead of TRACE
- Heartbeat enabling/disabling is now logged at DEBUG instead of TRACE
Author: Jason Gustafson <jason@confluent.io>
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Ismael Juma <ismael@juma.me.uk>
Closes#3676 from hachikuji/log-consumer-wakeups
Prior to this change, it was possible for the synchronous consumer commit request to be handled before previously-submitted asynchronous commit requests. If that happened, the out-of-order handlers improperly set the last committed offsets, which then became inconsistent with the offsets the connector task is working with.
This change ensures that the last committed offsets are updated only for the most recent commit request, even if the consumer reorders the calls to the callbacks.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Jason Gustafson <jason@confluent.io>
Closes#3662 from rhauch/kafka-5731
This ensures all logs have the connector/task ID, whether tasks are source or sink, and formats them consistently.
Author: Ewen Cheslack-Postava <me@ewencp.org>
Reviewers: Randall Hauch <rhauch@gmail.com>, Konstantine Karantasis <konstantine@confluent.io>, Jason Gustafson <jason@confluent.io>
Closes#3639 from ewencp/standardize-connector-task-logging
When a Connect distributed worker starts up talking with broker versions 0.10.1.0 and later, it will use the AdminClient to look for the internal topics and attempt to create them if they are missing. Although the AdminClient was added in 0.11.0.0, the AdminClient uses APIs to create topics that existed in 0.10.1.0 and later. This feature works as expected when Connect uses a broker version 0.10.1.0 or later.
However, when a Connect distributed worker starts up using a broker older than 0.10.1.0, the AdminClient is not able to find the required APIs and thus will throw an UnsupportedVersionException. Unfortunately, this exception is not caught and instead causes the Connect worker to fail even when the topics already exist.
This change handles the UnsupportedVersionException by logging a debug message and doing nothing. The existing producer logic will get information about the topics, which will cause the broker to create them if they don’t exist and broker auto-creation of topics is enabled. This is the same behavior that existed prior to 0.11.0.0, and so this change restores that behavior for brokers older than 0.10.1.0.
This change also adds a system test that verifies Connect works with a variety of brokers and is able to run source and sink connectors. The test verifies that Connect can read from the internal topics when the connectors are restarted.
Author: Randall Hauch <rhauch@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3641 from rhauch/kafka-5704
Clean up includes:
- Switching try-catch-finally blocks to try-with-resources when possible
- Removing some seemingly unnecessary `SuppressWarnings` annotations
- Resolving some Java warnings
- Closing unclosed Closable objects
- Removing unused code
Author: Vahid Hashemian <vahidhashemian@us.ibm.com>
Reviewers: Balint Molnar <balintmolnar91@gmail.com>, Guozhang Wang <wangguoz@gmail.com>, Matthias J. Sax <matthias@confluent.io>, Ismael Juma <ismael@juma.me.uk>, Jason Gustafson <jason@confluent.io>
Closes#3222 from vahidhashemian/minor/code_cleanup_1706
More input validation for SchemaBuilder methods.
Author: Jeremy Custenborder <jcustenborder@gmail.com>
Reviewers: Ewen Cheslack-Postava <ewen@confluent.io>
Closes#3474 from jcustenborder/KAFKA-5548
Charly Molter
Konstantine Karantasis
Gunnar Morling
Gavrie Philipson
Filipe Agapito
Arjun Satish
Study
Ewen Cheslack-Postava
Koen De Groote
Tobias Gies
Colin P. Mccabe
Soenke Liebau
Jeff Klukas
tedyu
sachinbhalekar
Adem Efe Gencer
Richard Yu
Randall Hauch
Ismael Juma
Rajini Sivaram
Thibaud Chardonnens
Andrey Dyachkov
oleg
Jason Gustafson
Hooman Broujerdi
Stephane Maarek
Vahid Hashemian
Jeremy Custenborder
Evgeny Veretennikov
