This change sets the groundwork for migrating other modules incrementally.
Main changes:
- Replace `junit` 4.13 with `junit-jupiter` and `junit-vintage` 5.7.0-RC1.
- All modules except for `tools` depend on `junit-vintage`.
- `tools` depends on `junit-jupiter`.
- Convert `tools` tests to JUnit 5.
- Update `PushHttpMetricsReporterTest` to use `mockito` instead of `powermock` and `easymock`
(powermock doesn't seem to work well with JUnit 5 and we don't need it since mockito can mock
static methods).
- Update `mockito` to 3.5.7.
- Update `TestUtils` to use JUnit 5 assertions since `tools` depends on it.
Unrelated clean-ups:
- Remove `unit` from package names in a few `core` tests.
- Replace `try/catch/fail` with `assertThrows` in a number of places.
- Tag `CoordinatorTest` as integration test.
- Remove unnecessary type parameters when invoking methods and constructors.
Tested with IntelliJ and gradle. Verified that the following commands work as expected:
* ./gradlew tools:unitTest
* ./gradlew tools:integrationTest
* ./gradlew tools:test
* ./gradlew core:unitTest
* ./gradlew core:integrationTest
* ./gradlew clients:test
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Only check if positions need validation if there is new metadata.
Also fix some inefficient java.util.stream code in the hot path of SubscriptionState.
I left out updates that could be risky. Preliminary testing indicates
we can build (including spotBugs) and run tests with Java 15 with
these changes. I will do more thorough testing once Java 15 reaches
release candidate stage in a few weeks.
Minor updates with mostly bug fixes:
- Scala: 2.12.11 -> 2.12.12 (compiler and collection performance improvements)
- Bouncy castle: 1.64 -> 1.66 (several bug fixes)
- HttpClient: 4.5.11 -> 4.5.12 (small number of bug fixes)
- Mockito: 3.3.3 -> 3.4.4 (several bug fixes and Java 15 support)
- Netty: 4.5.10 -> 4.5.11 (several bug fixes)
- Snappy: 1.1.7.3 -> 1.1.7.6 (small number of bug fixes)
- Zstd: 1.4.5-2 -> 1.4.5-6 (small number of bug fixes)
Gradle plugin and library upgrades:
- Gradle version plugins: 0.28.0 -> 0.29.0 (small number of bug fixes)
- Git: 4.0.1 -> 4.0.2 (small number of bug fixes)
- Scoverage plugin: 4.0.1 -> 4.0.2 (small number of bug fixes)
- Shadow plugin: 5.2.0 -> 6.0.0 (Java 15 support and require Gradle 6.0)
- Test Retry plugin: 1.1.5 -> 1.1.6 (small number of bug fixes)
- Spotless plugin: 4.4.4 -> 5.1.0 (several internal changes that should not matter to us)
- Spotbugs: 4.0.3 -> 4.0.6 (small number of bug fixes)
- Spotbugs plugin: 4.2.4 -> 4.4.4 (small number of bug fixes)
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
This PR includes 3 MessageFormatters for MirrorMaker2 internal topics:
- HeartbeatFormatter
- CheckpointFormatter
- OffsetSyncFormatter
This also introduces a new public interface org.apache.kafka.common.MessageFormatter that users can implement to build custom formatters.
Reviewers: Konstantine Karantasis <k.karantasis@gmail.com>, Ryanne Dolan <ryannedolan@gmail.com>, David Jacot <djacot@confluent.io>
Co-authored-by: Mickael Maison <mickael.maison@gmail.com>
Co-authored-by: Edoardo Comar <ecomar@uk.ibm.com>
This includes important fixes. Netty is required by ZooKeeper if TLS is
enabled.
I verified that the netty jars were changed from 4.1.48 to 4.1.50 with
this PR, `find . -name '*netty*'`:
```text
./core/build/dependant-libs-2.13.3/netty-handler-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-transport-native-epoll-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-codec-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-transport-native-unix-common-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-transport-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-resolver-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-buffer-4.1.50.Final.jar
./core/build/dependant-libs-2.13.3/netty-common-4.1.50.Final.jar
```
Note that the previous netty exclude no longer worked since we upgraded
to ZooKeeper 3.5.x as it switched to Netty 4 which has different module names.
Also, the Netty dependency is needed by ZooKeeper for TLS support so we
cannot exclude it.
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Fix findbugs multithreaded correctness warnings for streams, updated variables to be threadsafe
Reviewers: A. Sophie Blee-Goldman <sophie@confluent.io>, Boyang Chen <boyang@confluent.io>, John Roesler <vvcephei@apache.org>
Recently, commit 492306a updated both jetty to version 9.4.27.v20200227 and jersey to version 2.31
However in the latest versions of jetty, the renaming of the method `Response#closeOutput` to `Response#completeOutput` has been reverted, with the latest version using again `Response#closeOutput`.
Jersey has not released a recent version in which `Response#closeOutput` is called directly. In its currently latest version (2.31) `Response#closeOutput` will be called if `Response#completeOutput` throws a `NoSuchMethodError` exception. Given that, this version combination is compatible. Jersey should be upgraded once a new version that uses `Response#closeOutput` directly is out.
Reviewers: Ismael Juma <ismael@juma.me.uk>
I had to fix several compiler errors due to deprecation of auto application of `()`. A related
Xlint config (`-Xlint:nullary-override`) is no longer valid in 2.13, so we now only enable it
for 2.12. The compiler flagged two new inliner warnings that required suppression and
the semantics of `&` in `@nowarn` annotations changed, requiring a small change in
one of the warning suppressions.
I also removed the deprecation of a number of methods in `KafkaZkClient` as
they should not have been deprecated in the first place since `KafkaZkClient` is an
internal class and we still use these methods in the Controller and so on. This
became visible because the Scala compiler now respects Java's `@Deprecated`
annotation.
Finally, I included a few minor clean-ups (eg using `toBuffer` instead `toList`) when fixing
the compilation warnings.
Noteworthy bug fixes in Scala 2.13.3:
* Fix 2.13-only bug in Java collection converters that caused some operations to perform an extra pass
* Fix 2.13.2 performance regression in Vector: restore special cases for small operands in appendedAll and prependedAll
* Increase laziness of #:: for LazyList
* Fixes related to annotation parsing of @Deprecated from Java sources in mixed compilation
Full release notes:
https://github.com/scala/scala/releases/tag/v2.13.3
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Upgrade jetty to 9.4.27.v20200227 and jersey to 2.31
Also remove the workaround used on previous versions from Connect's SSLUtils.
(Reverts KAFKA-9771 - commit ee832d7d)
Reviewers: Ismael Juma <ismael@juma.me.uk>, Chris Egerton <chrise@confluent.io>, Konstantine Karantasis <konstantine@confluent.io>
Gradle 6.5 includes a fix for https://github.com/gradle/gradle/pull/12866, which
affects the performance of Scala compilation.
I profiled the scalac build with async profiler and 54% of the time was on GC
even after the Gradle upgrade (it was more than 60% before), so I switched to
the throughput GC (GC latency is less important for batch builds) and it
was reduced to 38%.
I also centralized the jvm configuration in `build.gradle` and simplified it a bit
by removing the minHeapSize configuration from the test tasks.
On my desktop, the time to execute clean builds with no cached Gradle daemon
was reduced from 127 seconds to 97 seconds. With a cached daemon, it was
reduced from 120 seconds to 88 seconds. The performance regression when
we upgraded to Gradle 6.x was 27 seconds with a cached daemon
(https://github.com/apache/kafka/pull/7677#issuecomment-616271179), so it
should be fixed now.
Gradle 6.4 with no cached daemon:
```
BUILD SUCCESSFUL in 2m 7s
115 actionable tasks: 112 executed, 3 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.15s user 0.12s system 0% cpu 2:08.06 total
```
Gradle 6.4 with cached daemon:
```
BUILD SUCCESSFUL in 2m 0s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 0.95s user 0.10s system 0% cpu 2:01.42 total
```
Gradle 6.5 with no cached daemon:
```
BUILD SUCCESSFUL in 1m 46s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.27s user 0.12s system 1% cpu 1:47.71 total
```
Gradle 6.5 with cached daemon:
```
BUILD SUCCESSFUL in 1m 37s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.02s user 0.10s system 1% cpu 1:38.31 total
```
This PR with no cached Gradle daemon:
```
BUILD SUCCESSFUL in 1m 37s
115 actionable tasks: 81 executed, 34 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.27s user 0.10s system 1% cpu 1:38.70 total
```
This PR with cached Gradle daemon:
```
BUILD SUCCESSFUL in 1m 28s
115 actionable tasks: 111 executed, 4 up-to-date
./gradlew clean compileScala compileJava compileTestScala compileTestJava 1.02s user 0.10s system 1% cpu 1:29.35 total
```
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Chia-Ping Tsai <chia7712@gmail.com>
It improves decompression speed:
>For x64 cpus, expect a speed bump of at least +5%, and up to +10% in favorable cases.
>ARM cpus receive more benefit, with speed improvements ranging from +15% vicinity,
>and up to +50% for certain SoCs and scenarios (ARM‘s situation is more complex due
>to larger differences in SoC designs).
See https://github.com/facebook/zstd/releases/tag/v1.4.5 for more details.
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
This fixes critical bugs in Gradle 6.4:
* Regression: Different daemons are used between IDE and CLI builds for the same project
* Regression: Main-Class attribute always added to jar manifest when using application plugin
* Fix potential NPE if code is executed concurrently
More details: https://github.com/gradle/gradle/releases/tag/v6.4.1
Reviewers: Manikumar Reddy <manikumar@confluent.io>
It fixes 30 issues, including third party CVE fixes, several leader-election
related fixes and a compatibility issue with applications built against earlier
3.5 client libraries (by restoring a few non public APIs).
See ZooKeeper 3.5.8 Release Notes for details: https://zookeeper.apache.org/doc/r3.5.8/releasenotes.html
Reviewers: Manikumar Reddy <manikumar@confluent.io>
The version of Zinc included with Gradle 6.4 includes a fix for the blocker
that was preventing us from passing `-release 8` to scalac.
Release notes for Gradle 6.4:
https://docs.gradle.org/6.4/release-notes.html
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
In the case described in the JIRA, there was a 50%+ increase in the total fetch request rate in
2.4.0 due to this change.
I included a few additional clean-ups:
* Simplify `findPreferredReadReplica` and avoid unnecessary collection copies.
* Use `LongSupplier` instead of `Supplier<Long>` in `SubscriptionState` to avoid unnecessary boxing.
Added a unit test to ReplicaManagerTest and cleaned up the test class a bit including
consistent usage of Time in MockTimer and other components.
Reviewers: Gwen Shapira <gwen@confluent.io>, David Arthur <mumrah@gmail.com>, Jason Gustafson <jason@confluent.io>
* Upgrade to Scala 2.13.2 which introduces the ability to suppress warnings.
* Upgrade to scala-collection-compat 2.1.6 as it introduces the
@nowarn annotation for Scala 2.12.
* While at it, also update scala-java8-compat to 0.9.1.
* Fix compiler warnings and add @nowarn for the unfixed ones.
Scala 2.13.2 highlights (besides @nowarn):
* Rewrite Vector (using "radix-balanced finger tree vectors"),
for performance. Small vectors are now more compactly
represented. Some operations are now drastically faster on
large vectors. A few operations may be a little slower.
* Matching strings makes switches in bytecode.
https://github.com/scala/scala/releases/tag/v2.13.2
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Also:
* Remove deprecated `=` in resolutionStrategy.
* Replace `AES/GCM/PKCS5Padding` with `AES/GCM/NoPadding`
in `PasswordEncoderTest`. The former is invalid and JDK 14 rejects it,
see https://bugs.openjdk.java.net/browse/JDK-8229043.
With these changes, the build works with Java 14 and Scala 2.12. The
same will apply to Scala 2.13 when Scala 2.13.2 is released (should
happen within 1-2 weeks).
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Matthias J. Sax <matthias@confluent.io>
* Introduce `gradlewAll` script to replace `*All` tasks since the approach
used by the latter doesn't work since Gradle 6.0 and it's unclear when,
if ever, it will work again ( see https://github.com/gradle/gradle/issues/11301).
* Update release script and README given the above.
* Update zinc to 1.3.5.
* Update gradle-versions-plugin to 0.28.0.
The major improvements in Gradle 6.0 to 6.3 are:
- Improved incremental compilation for Scala
- Support for Java 14 (although some Gradle plugins
like spotBugs may need to be updated or disabled,
will do that separately)
- Improved scalac reporting, warnings are clearly
marked as such, which is very helpful.
Tested `gradlewAll` manually for the commands listed in the README
and release script. For `uploadArchive`, I tested it with a local Maven
repository.
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Once Scala 2.13.2 is officially released, I will submit a follow up PR
that enables `-Xfatal-warnings` with the necessary warning
exclusions. Compiler warning exclusions were only introduced in 2.13.2
and hence why we have to wait for that. I used a snapshot build to
test it in the meantime.
Changes:
* Remove Deprecated annotation from internal request classes
* Class.newInstance is deprecated in favor of
Class.getConstructor().newInstance
* Replace deprecated JavaConversions with CollectionConverters
* Remove unused kafka.cluster.Cluster
* Don't use Map and Set methods deprecated in 2.13:
- collection.Map +, ++, -, --, mapValues, filterKeys, retain
- collection.Set +, ++, -, --
* Add scala-collection-compat dependency to streams-scala and
update version to 2.1.4.
* Replace usages of deprecated Either.get and Either.right
* Replace usage of deprecated Integer(String) constructor
* `import scala.language.implicitConversions` is not needed in Scala 2.13
* Replace usage of deprecated `toIterator`, `Traversable`, `seq`,
`reverseMap`, `hasDefiniteSize`
* Replace usage of deprecated alterConfigs with incrementalAlterConfigs
where possible
* Fix implicit widening conversions from Long/Int to Double/Float
* Avoid implicit conversions to String
* Eliminate usage of deprecated procedure syntax
* Remove `println`in `LogValidatorTest` instead of fixing the compiler
warning since tests should not `println`.
* Eliminate implicit conversion from Array to Seq
* Remove unnecessary usage of 3 argument assertEquals
* Replace `toStream` with `iterator`
* Do not use deprecated SaslConfigs.DEFAULT_SASL_ENABLED_MECHANISMS
* Replace StringBuilder.newBuilder with new StringBuilder
* Rename AclBuffers to AclSeqs and remove usage of `filterKeys`
* More consistent usage of Set/Map in Controller classes: this also fixes
deprecated warnings with Scala 2.13
* Add spotBugs exclusion for inliner artifact in KafkaApis with Scala 2.12.
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Chia-Ping Tsai <chia7712@gmail.com>
This PR works to improve high watermark checkpointing performance.
`ReplicaManager.checkpointHighWatermarks()` was found to be a major contributor to GC pressure, especially on Kafka clusters with high partition counts and low throughput.
Added a JMH benchmark for `checkpointHighWatermarks` which establishes a
performance baseline. The parameterized benchmark was run with 100, 1000 and
2000 topics.
Modified `ReplicaManager.checkpointHighWatermarks()` to avoid extra copies and cached
the Log parent directory Sting to avoid frequent allocations when calculating
`File.getParent()`.
A few clean-ups:
* Changed all usages of Log.dir.getParent to Log.parentDir and Log.dir.getParentFile to
Log.parentDirFile.
* Only expose public accessor for `Log.dir` (consistent with `Log.parentDir`)
* Removed unused parameters in `Partition.makeLeader`, `Partition.makeFollower` and `Partition.createLogIfNotExists`.
Benchmark results:
| Topic Count | Ops/ms | MB/sec allocated |
|-------------|---------|------------------|
| 100 | + 51% | - 91% |
| 1000 | + 143% | - 49% |
| 2000 | + 149% | - 50% |
Reviewers: Lucas Bradstreet <lucas@confluent.io>. Ismael Juma <ismael@juma.me.uk>
Co-authored-by: Gardner Vickers <gardner@vickers.me>
Co-authored-by: Ismael Juma <ismael@juma.me.uk>
Highlights:
* Performance improvements in the ollections
library: algorithmic improvements and
changes to avoid unnecessary allocations.
* Performance improvements in the compiler.
* ASM was upgraded to 7.3.1, allowing the
optimizer to run on JDK 13+.
Full release notes: https://github.com/scala/scala/releases/tag/v2.12.11
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>, Chia-Ping Tsai <chia7712@gmail.com>
This PR removes intermediate conversions between `MetadataResponse.TopicMetadata` => `MetadataResponseTopic` and `MetadataResponse.PartitionMetadata` => `MetadataResponsePartition` objects.
There is 15-20% reduction in object allocations and 5-10% improvement in metadata request performance.
Reviewers: Ismael Juma <ismael@juma.me.uk>, Jason Gustafson<jason@confluent.io>
9.4.25 renamed closeOutput to completeOutput
(c5acf96506),
which is a method used by recent Jersey versions including the
latest (2.30.1). An example of the error:
> java.lang.NoSuchMethodError: org.eclipse.jetty.server.Response.closeOutput()V
> at org.glassfish.jersey.jetty.JettyHttpContainer$ResponseWriter.commit(JettyHttpContainer.java:326)
The request still completes and hence why no test fails. We should think about how
to improve the testing for this kind of problem, but I want to get the fix in before
2.5 RC0.
Credit to @rigelbm for finding this.
Reviewers: Ewen Cheslack-Postava <me@ewencp.org>, Andrew Choi <a24choi@edu.uwaterloo.ca>
Disabled by default, but enabled for Jenkins PR builds (maximum of 1 retry per
test with up to 5 retries for the test run).
Reviewers: Ismael Juma <ismael@juma.me.uk>
This PR implements the KIP-559: https://cwiki.apache.org/confluence/display/KAFKA/KIP-559%3A+Make+the+Kafka+Protocol+Friendlier+with+L7+Proxies
- it adds the Protocol Type and the Protocol Name fields in JoinGroup and SyncGroup API;
- it validates that the fields are provided by the client when the new version of the API is used and ensure that they are consistent. it errors out otherwise;
- it validates that the fields are consistent in the client and errors out otherwise;
- it adds many tests related to the API changes but also extends the testing coverage of the requests/responses themselves.
- it standardises the naming in the coordinator. now, `ProtocolType` and `ProtocolName` are used across the board in the coordinator instead of having a mix of protocol type, protocol name, subprotocol, protocol, etc.
Reviewers: Jason Gustafson <jason@confluent.io>
* lz4: fixes identified by oss-fuzz
* jetty: fixes a few recent regressions
* powermock: better support for Java 12+
* zstd-jni: minor fixes
* httpclient: minor fixes
* spotless-plugin: minor fixes
* jmh: minor fixes
Reviewers: Rajini Sivaram <rajinisivaram@googlemail.com>
* Adjust build and documentation.
* Use lambda syntax for SAM types in `core`, `streams-scala` and
`connect-runtime` modules.
* Remove `runnable` and `newThread` from `CoreUtils` as lambda
syntax for SAM types make them unnecessary.
* Remove stale comment in `FunctionsCompatConversions`,
`KGroupedStream`, `KGroupedTable' and `KStream` about Scala 2.11,
the conversions are needed for Scala 2.12 too.
* Deprecate `org.apache.kafka.streams.scala.kstream.Suppressed`
and use `org.apache.kafka.streams.kstream.Suppressed` instead.
* Use `Admin.create` instead of `AdminClient.create`. Static methods
in Java interfaces can be invoked since Scala 2.12. I noticed that
MirrorMaker 2 uses `AdminClient.create`, but I did not change them
as Connectors have restrictions on newer client APIs.
* Improve efficiency in a few `Gauge` implementations by avoiding
unnecessary intermediate collections.
* Remove pointless `Option.apply` in `ZookeeperClient`
`SessionState` metric.
* Fix unused import/variable and other compiler warnings.
* Reduce visibility of some vals/defs.
Reviewers: Manikumar Reddy <manikumar@confluent.io>, Guozhang Wang <wangguoz@gmail.com>, Gwen Shapira <gwen@confluent.io>
Newer versions of Gradle handle this automatically. Tested with Gradle 5.6.
Credit to @granthenke for the tip.
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
Given we need to follow the Apache rule of not checking
any binaries into the source code, Kafka has always had
a bit of a tricky Gradle bootstrap.
Using ./gradlew as users expect doesn’t work and a
local and compatible version of Gradle was required to
generate the wrapper first.
This patch changes the behavior of the wrapper task to
instead generate a gradlew script that can bootstrap the
jar itself. Additionally it adds a license, removes the bat
script, and handles retries.
The documentation in the readme was also updated.
Going forward patches that upgrade gradle should run
`gradle wrapper` before checking in the change.
With this change users using ./gradlew can be sure they
are always building with the correct version of Gradle.
Reviewers: Viktor Somogyi <viktorsomogyi@gmail.com>, Ismael Juma <ismael@juma.me.uk
Rather than maintain hand coded protocol serialization code, Streams could use the same code-generation framework as Clients/Core.
There isn't a perfect match, since the code generation framework includes an assumption that you're generating "protocol messages", rather than just arbitrary blobs, but I think it's close enough to justify using it, and improving it over time.
Using the code generation allows us to drop a lot of detail-oriented, brittle, and hard-to-maintain serialization logic in favor of a schema spec.
Reviewers: Colin P. McCabe <cmccabe@apache.org>, Boyang Chen <boyang@confluent.io>, Bill Bejeck <bill@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
It includes an important fix for people running on k8s:
* ZOOKEEPER-3320: Leader election port stop listen when
hostname unresolvable for some time
Reviewers: Manikumar Reddy <manikumar.reddy@gmail.com>
The scalac optimizer is able to inline methods to avoid lambda allocations, eliminating
the runtime cost of higher order functions in many cases. The compilation parameters
we are using here were introduced in 2.12.x, so we don't enable them for Scala 2.11.
Also, we enable a more aggressive inlining policy for the `core` project since it's
not meant to be used as a library.
See https://www.lightbend.com/blog/scala-inliner-optimizer for more information about
the optimizer.
I verified that the lambda allocation in the code below (from LogCleaner.scala) went away
after this change with Scala 2.12 and 2.13.
```scala
private def consumeAbortedTxnsUpTo(offset: Long): Unit = {
while (abortedTransactions.headOption.exists(_.firstOffset <= offset)) {
val abortedTxn = abortedTransactions.dequeue()
ongoingAbortedTxns.getOrElseUpdate(abortedTxn.producerId, new AbortedTransactionMetadata(abortedTxn))
}
}
```
The relevant part of the bytecode when compiled with Scala 2.13 looks like:
```text
private void consumeAbortedTxnsUpTo(long);
Code:
0: aload_0
1: invokespecial #54 // Method abortedTransactions:()Lscala/collection/mutable/PriorityQueue;
4: invokevirtual #175 // Method scala/collection/mutable/PriorityQueue.headOption:()Lscala/Option;
7: dup
8: ifnonnull 13
11: aconst_null
12: athrow
13: astore 4
15: aload 4
17: invokevirtual #145 // Method scala/Option.isEmpty:()Z
20: ifne 48
23: aload 4
25: invokevirtual #148 // Method scala/Option.get:()Ljava/lang/Object;
28: checkcast #177 // class kafka/log/AbortedTxn
```
The increased inlining causes some spurious spotBugs warnings, I added a few suppressions
and fixed one warning by avoiding unnecessary boxing.
Reviewers: Guozhang Wang <wangguoz@gmail.com>
Part of supporting KIP-213 ( https://cwiki.apache.org/confluence/display/KAFKA/KIP-213+Support+non-key+joining+in+KTable ). Murmur3 hash is used as a hashing mechanism in KIP-213 for the large range of uniqueness. The Murmur3 class and tests are ported directly from Apache Hive, with no alterations to the code or dependencies.
Author: Adam Bellemare <adam.bellemare@wishabi.com>
Reviewers: John Roesler <vvcephei@users.noreply.github.com>, Ismael Juma <ismael@juma.me.uk>, Guozhang Wang <wangguoz@gmail.com>
Closes#7271 from bellemare/murmur3hash
Ismael Juma
David Arthur
John Roesler
Randall Hauch
Nitesh Mor
Mickael Maison
leah
Konstantine Karantasis
Andras Katona
David Jacot
showuon
Boyang Chen
Bill Bejeck
Gardner Vickers
jiameixie
Manikumar Reddy
Viktor Somogyi
Bruno Cadonna
Grant Henke
Lucas Bradstreet
Guozhang Wang
Adam Bellemare
