iwasakims commented on a change in pull request #316: FLUME-3355. Upgrade Kafka
to 2.3.1.
URL: https://github.com/apache/flume/pull/316#discussion_r379902064
##########
File path: pom.xml
##########
@@ -116,7 +116,7 @@ limitations under the License.
<xalan.version>2.7.2</xalan.version>
<xerces.version>2.9.1</xerces.version>
<wiremock.version>1.53</wiremock.version>
- <zookeeper.version>3.4.5</zookeeper.version>
+ <zookeeper.version>3.4.13</zookeeper.version>
Review comment:
@tmgstevens We need to upgrade ZooKeeper to 3.4.7 at least for Kafka 2.1.0
and above which uses functionality backported on
[ZOOKEEPER-2237](https://issues.apache.org/jira/browse/ZOOKEEPER-2237). Unit
tests fail with following error if ``zookeeper.version`` is 3.4.5, though there
is no compilation error.
```
2020-02-16 12:43:05,908 (main) [ERROR -
org.slf4j.helpers.MarkerIgnoringBase.error(MarkerIgnoringBase.java:159)] Fatal
error during KafkaServer startup. Prepare to shutdown
java.lang.NoClassDefFoundError:
org/apache/zookeeper/AsyncCallback$MultiCallback
at kafka.zk.KafkaZkClient$.apply(KafkaZkClient.scala:1825)
at
kafka.server.KafkaServer.kafka$server$KafkaServer$$createZkClient$1(KafkaServer.scala:363)
at kafka.server.KafkaServer.initZkClient(KafkaServer.scala:387)
at kafka.server.KafkaServer.startup(KafkaServer.scala:207)
at
kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38)
at
org.apache.flume.source.kafka.KafkaSourceEmbeddedKafka.<init>(KafkaSourceEmbeddedKafka.java:84)
at
org.apache.flume.source.kafka.TestKafkaSource.startKafkaServer(TestKafkaSource.java:112)
...(snip)
```
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