Hello,
i believe the cassandra connector is not shading it's dependencies
properly. This didn't cause issues in the
past since flink used to have a dependency on codahale metrics as well.
Please open a JIRA for this issue.
Regards,
Chesnay
On 06.03.2017 11:32, Tarandeep Singh wrote:
Hi Robert & Nico,
I am facing the same problem (java.lang.NoClassDefFoundError:
com/codahale/metrics/Metric)
Can you help me identify shading issue in pom.xml file.
My pom.xml content-
---------------------------------------------
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd";> <modelVersion>4.0.0</modelVersion> <groupId>rfk-dataplatform</groupId> <artifactId>stream-processing</artifactId> <version>0.1.0</version> <packaging>jar</packaging> <name>Stream processing</name><properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <flink.version>1.2.0</flink.version> <slf4j.version>1.7.7</slf4j.version> <log4j.version>1.2.17</log4j.version> </properties> <dependencies><dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-streaming-java_2.10</artifactId> <version>${flink.version}</version> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-clients_2.10</artifactId> <version>${flink.version}</version> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-connector-cassandra_2.10</artifactId> <version>1.2.0</version> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-statebackend-rocksdb_2.10</artifactId> <version>1.2.0</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.apache.avro</groupId> <artifactId>avro</artifactId> <version>1.8.1</version> </dependency> <dependency> <groupId>org.testng</groupId> <artifactId>testng</artifactId> <version>6.8</version> <scope>test</scope> </dependency> <!-- flink kafka connector --> <dependency>
<groupId>org.apache.flink</groupId> <artifactId>flink-connector-kafka-0.8_2.10</artifactId> <version>1.2.0</version> </dependency> <!-- java influxdb client --> <dependency>
<groupId>org.influxdb</groupId> <artifactId>influxdb-java</artifactId> <version>2.5</version> </dependency> </dependencies> <profiles> <profile> <!--
Profile for packaging correct JAR files --> <id>build-jar</id> <activation> <activeByDefault>false</activeByDefault> </activation> <dependencies> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-java</artifactId> <version>${flink.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-streaming-java_2.10</artifactId> <version>${flink.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-clients_2.10</artifactId> <version>${flink.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <!-- disable
the exclusion rules --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>2.4.1</version> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <artifactSet> <excludes
combine.self="override"></excludes> </artifactSet> </configuration>
</execution> </executions> </plugin> </plugins> </build> </profile>
</profiles> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>2.4.1</version> <executions> <!-- Run shade goal on package phase -->
<execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <artifactSet> <excludes> <!-- This
list contains all dependencies of flink-dist Everything else will be
packaged into the fat-jar --> <exclude>org.apache.flink:flink-annotations</exclude> <exclude>org.apache.flink:flink-shaded-hadoop2</exclude> <exclude>org.apache.flink:flink-shaded-curator-recipes</exclude> <exclude>org.apache.flink:flink-core</exclude> <exclude>org.apache.flink:flink-java</exclude> <exclude>org.apache.flink:flink-scala_2.10</exclude> <exclude>org.apache.flink:flink-runtime_2.10</exclude> <exclude>org.apache.flink:flink-optimizer_2.10</exclude> <exclude>org.apache.flink:flink-clients_2.10</exclude> <exclude>org.apache.flink:flink-avro_2.10</exclude> <exclude>org.apache.flink:flink-examples-batch_2.10</exclude> <exclude>org.apache.flink:flink-examples-streaming_2.10</exclude> <exclude>org.apache.flink:flink-streaming-java_2.10</exclude> <exclude>org.apache.flink:flink-streaming-scala_2.10</exclude> <exclude>org.apache.flink:flink-scala-shell_2.10</exclude> <exclude>org.apache.flink:flink-python</exclude> <exclude>org.apache.flink:flink-metrics-core</exclude> <exclude>org.apache.flink:flink-metrics-jmx</exclude> <exclude>org.apache.flink:flink-statebackend-rocksdb_2.10</exclude> <!-- Also exclude very big transitive dependencies of Flink
WARNING: You have to remove these excludes if your code relies on
other versions of these dependencies. --> <exclude>log4j:log4j</exclude> <exclude>org.scala-lang:scala-library</exclude> <exclude>org.scala-lang:scala-compiler</exclude> <exclude>org.scala-lang:scala-reflect</exclude> <exclude>com.data-artisans:flakka-actor_*</exclude> <exclude>com.data-artisans:flakka-remote_*</exclude> <exclude>com.data-artisans:flakka-slf4j_*</exclude> <exclude>io.netty:netty-all</exclude> <exclude>io.netty:netty</exclude> <exclude>commons-fileupload:commons-fileupload</exclude> <exclude>org.apache.avro:avro</exclude> <exclude>commons-collections:commons-collections</exclude> <exclude>org.codehaus.jackson:jackson-core-asl</exclude> <exclude>org.codehaus.jackson:jackson-mapper-asl</exclude> <exclude>com.thoughtworks.paranamer:paranamer</exclude> <exclude>org.xerial.snappy:snappy-java</exclude> <exclude>org.apache.commons:commons-compress</exclude> <exclude>org.tukaani:xz</exclude> <exclude>com.esotericsoftware.kryo:kryo</exclude> <exclude>com.esotericsoftware.minlog:minlog</exclude> <exclude>org.objenesis:objenesis</exclude> <exclude>com.twitter:chill_*</exclude> <exclude>com.twitter:chill-java</exclude> <exclude>commons-lang:commons-lang</exclude> <exclude>junit:junit</exclude> <exclude>org.apache.commons:commons-lang3</exclude> <exclude>org.slf4j:slf4j-api</exclude> <exclude>org.slf4j:slf4j-log4j12</exclude> <exclude>log4j:log4j</exclude> <exclude>org.apache.commons:commons-math</exclude> <exclude>org.apache.sling:org.apache.sling.commons.json</exclude> <exclude>commons-logging:commons-logging</exclude> <exclude>commons-codec:commons-codec</exclude> <exclude>com.fasterxml.jackson.core:jackson-core</exclude> <exclude>com.fasterxml.jackson.core:jackson-databind</exclude> <exclude>com.fasterxml.jackson.core:jackson-annotations</exclude> <exclude>stax:stax-api</exclude> <exclude>com.typesafe:config</exclude> <exclude>org.uncommons.maths:uncommons-maths</exclude> <exclude>com.github.scopt:scopt_*</exclude> <exclude>commons-io:commons-io</exclude> <exclude>commons-cli:commons-cli</exclude> </excludes> </artifactSet> <filters> <filter> <artifact>org.apache.flink:*</artifact> <excludes> <!-- exclude shaded google but include shaded
curator --> <exclude>org/apache/flink/shaded/com/**</exclude> <exclude>web-docs/**</exclude> </excludes> </filter> <filter> <artifact>*:*</artifact> <excludes> <exclude>META-INF/*.SF</exclude> <exclude>META-INF/*.DSA</exclude> <exclude>META-INF/*.RSA</exclude> </excludes> </filter> </filters> <createDependencyReducedPom>false</createDependencyReducedPom> </configuration> </execution>
</executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.avro</groupId> <artifactId>avro-maven-plugin</artifactId> <version>1.8.1</version> <executions> <execution> <phase>generate-sources</phase> <goals> <goal>schema</goal> </goals> <configuration> <stringType>String</stringType> <fieldVisibility>PRIVATE</fieldVisibility> <sourceDirectory>${project.basedir}/src/main/schema/</sourceDirectory> <outputDirectory>${project.basedir}/src/main/java/</outputDirectory> </configuration> </execution> </executions>
</plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>
---------------------------------------------
On Sun, Feb 12, 2017 at 1:56 AM, Robert Metzger <rmetz...@apache.org
<mailto:rmetz...@apache.org>> wrote:
Hi Nico,
The cassandra connector should be available on Maven central:
http://search.maven.org/#artifactdetails%7Corg.apache.flink%7Cflink-connector-cassandra_2.10%7C1.2.0%7Cjar
<http://search.maven.org/#artifactdetails%7Corg.apache.flink%7Cflink-connector-cassandra_2.10%7C1.2.0%7Cjar>
Potentially, the issue you've mentioned is due to some shading
issue. Is the "com/codahale/metrics/Metric" class in your user
code jar?
On Thu, Feb 9, 2017 at 2:56 PM, Nico <nico.franz...@gmail.com
<mailto:nico.franz...@gmail.com>> wrote:
Hi,
I would like to upgrade to the new stable version 1.2 - but i
get an ClassNotFound exception when i start the application.
Caused by: java.lang.NoClassDefFoundError:
com/codahale/metrics/Metric
at
com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1367)
at com.datastax.driver.core.Cluster.init(Cluster.java:162)
at
com.datastax.driver.core.Cluster.connectAsync(Cluster.java:333)
at
com.datastax.driver.core.Cluster.connectAsync(Cluster.java:308)
at com.datastax.driver.core.Cluster.connect(Cluster.java:250)
at
org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase.open(CassandraSinkBase.java:67)
at
org.apache.flink.streaming.connectors.cassandra.CassandraTupleSink.open(CassandraTupleSink.java:42)
at
org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36)
at
org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:112)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:386)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:262)
at
org.apache.flink.runtime.taskmanager.Task.run(Task.java:655)
at java.lang.Thread.run(Thread.java:745)
So I think the cassandra connector is the reason for it.
Moreover, i don't see a version 1.2 in the maven repository
for the connector as mentioned in the doc.
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-cassandra_2.10</artifactId>
<version>1.2.0</version>
</dependency>
Is there a plan to release a new version?
Best,
Nico
