我正在尝试使用谷歌反射库扩展flink过程的业务逻辑。我在运行时遇到了这个异常。有人试验过同样的问题。我怀疑是maven冲突，但我不知道。我粘贴了异常和pom文件。
pom文件：
<?xml version="1.0" encoding="UTF-8"?>
<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>it.almaviva.wtf.mms</groupId>
<artifactId>mms-integretedmobilitystatusevent-flink-process</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Passing Event Process</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<flink.version>1.4.0</flink.version>
<!--<slf4j.version>1.7.7</slf4j.version>-->
<log4j.version>1.2.17</log4j.version>
<scala.binary.version>2.11</scala.binary.version>
<junit.version>4.12</junit.version>
<cassandra.version>3.2.0</cassandra.version>
<flink.connector.elastic.version>1.4.0</flink.connector.elastic.version>
<thyco.compiler.version>0.21.0</thyco.compiler.version>
<jackson.version>2.9.4</jackson.version>
<cassandra.unit.version>3.3.0.2</cassandra.unit.version>
</properties>
<repositories>
<repository>
<id>apache.snapshots</id>
<name>Apache Development Snapshot Repository</name>
<url>https://repository.apache.org/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
</snapshots>
</repository>
</repositories>
<!-- Execute "mvn clean package -Pbuild-jar" to build a jar file out of
this project! How to use the Flink Quickstart pom: a) Adding new dependencies:
You can add dependencies to the list below. Please check if the maven-shade-plugin
below is filtering out your dependency and remove the exclude from there.
b) Build a jar for running on the cluster: There are two options for creating
a jar from this project b.1) "mvn clean package" -> this will create a fat
jar which contains all dependencies necessary for running the jar created
by this pom in a cluster. The "maven-shade-plugin" excludes everything that
is provided on a running Flink cluster. b.2) "mvn clean package -Pbuild-jar"
-> This will also create a fat-jar, but with much nicer dependency exclusion
handling. This approach is preferred and leads to much cleaner jar files. -->
<dependencies>
<!-- Apache Flink dependencies -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-core</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- This dependency is required to actually execute jobs. It is currently pulled in by
flink-streaming-java, but we explicitly depend on it to safeguard against future changes. -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka-0.10_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- explicitly add a standard loggin framework, as Flink does not have
a hard dependency on one specific framework by default -->
<!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- TEST PURPOSE -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.cassandraunit</groupId>
<artifactId>cassandra-unit-shaded</artifactId>
<version>3.3.0.2</version>
</dependency>
<!-- DATASTAX -->
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-extras</artifactId>
<version>${cassandra.version}</version>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<artifactId>netty-handler</artifactId>
<groupId>io.netty</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-mapping</artifactId>
<version>${cassandra.version}</version>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-elasticsearch5_2.11</artifactId>
<version>${flink.connector.elastic.version}</version>
<scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch-core -->
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>5.1.2</version>
</dependency>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>5.1.2</version>
</dependency>
<dependency>
<groupId>com.carrotsearch</groupId>
<artifactId>hppc</artifactId>
<version>0.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-scala_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-scala_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-cep_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-statebackend-rocksdb_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-cassandra_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.6.1</version>
</dependency>
<dependency>
<groupId>io.flinkspector</groupId>
<artifactId>flinkspector-datastream_2.11</artifactId>
<version>0.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.reflections</groupId>
<artifactId>reflections</artifactId>
<version>0.9.11</version>
<exclusions>
<exclusion>
<artifactId>guava</artifactId>
<groupId>com.google.guava</groupId>
</exclusion>
</exclusions>
</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-core</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
<scope>provided</scope>
</dependency>
<!-- DTO -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- APACHE CASSANDRA -->
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-extras</artifactId>
<version>${cassandra.version}</version>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-mapping</artifactId>
<version>${cassandra.version}</version>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.reflections</groupId>
<artifactId>reflections</artifactId>
<version>0.9.11</version>
</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"/>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<build>
<plugins>
<!-- We use the maven-shade plugin to create a fat jar that contains all
dependencies except flink and it's transitive dependencies. The resulting
fat-jar can be executed on a cluster. Change the value of Program-Class if
your program entry point changes. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</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-hadoop1_2.10</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>
<!-- 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>org.scala-lang:scala-library</exclude>
<exclude>org.scala-lang:scala-compiler</exclude>
<exclude>org.scala-lang:scala-reflect</exclude>
<exclude>com.typesafe.akka:akka-actor_*</exclude>
<exclude>com.typesafe.akka:akka-remote_*</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>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>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>
<!-- Do not copy the signatures in the META-INF folder. Otherwise,
this might cause SecurityExceptions when using the JAR. -->
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
<!-- If you want to use ./bin/flink run <quickstart jar> uncomment
the following lines. This will add a Main-Class entry to the manifest file -->
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>it.almaviva.wtf.mms.integratemobilitystatusevent.PassingEventProcess
</mainClass>
</transformer>
</transformers>
<createDependencyReducedPom>false</createDependencyReducedPom>
</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>
<compilerId>jdt</compilerId>
</configuration>
<dependencies>
<dependency>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-compiler-jdt</artifactId>
<version>0.21.0</version>
</dependency>
</dependencies>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerId>jdt</compilerId>
</configuration>
<dependencies>
<dependency>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-compiler-jdt</artifactId>
<version>0.21.0</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<versionRange>[2.4,)</versionRange>
<goals>
<goal>single</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<versionRange>[3.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
错误：
22：24：56.552 [main] INFO org.reflections.Reflections - 反射需要370毫秒来扫描1个网址，在线程“main”java.lang.NoSuchMethodError：com.google.common.collect中生成16个键和52个值Exception。设置$ SetView.iterator（）LCOM /谷歌/普通/收集/ UnmodifiableIterator; at org.reflections.Reflections.expandSuperTypes（Reflections.java:380）atg.reflections.Reflections。（Reflections.java:126）atg.reflections.Reflections。（Reflections.java:168）atg.reflections.Reflections。 （Reflections.java:141）at it.almaviva.wtf.mms.integratemobilitystatusevent.PassingEventProcess.preferredCustomLogicMethod（PassingEventProcess.java:213）it ital.jpg，。
我很确定这是非Flink相关的问题。由反射0.9.11引起的问题方法SetsView#iterator来自Guava 20.0，你在你的pom中排除，而cassandra-driver-extras拉入Guava 19（doesn't have this method）。你可以通过执行以下方式检查：
mvn dependency:tree你必须以某种方式解决cassandra和反射依赖之间的这种冲突。您可以尝试将guava版本强制为20.0，删除cassandra-driver-extras依赖项或查找没有guava依赖项的cassandra-driver-extras版本（Flink隐藏它的Guava依赖性，因此Flink的用户不必处理此问题）。