我有一个java应用程序,我正在使用Flink Api
。所以基本上我要对代码做的是创建两个记录很少的数据集,然后将它们作为两个表和必要的字段注册。
DataSet<Company> comp = env.fromElements(
new Company("Aux", 1),
new Company("Comp2", 2),
new Company("Comp3", 3));
DataSet<Employee> emp = env.fromElements(
new Employee("Kula", 1),
new Employee("Ish", 1),
new Employee("Kula", 3));
tEnv.registerDataSet("Employee", emp, "name, empId");
tEnv.registerDataSet("Company", comp, "cName, empId");
然后我尝试使用Table API
:
Table anotherJoin = tEnv.sql("SELECT Employee.name, Employee.empId, Company.cName FROM " +
"Employee RIGHT JOIN Company on Employee.empId = Company.empId");
我只是在控制台上打印结果。 在我的计算机上完全可以在本地。我使用带有依赖关系的fat-jar
创建了maven-shade-plugin
,我正在尝试在AWS Lambda
中执行它。
所以当我尝试在那里执行时,我会被抛出以下异常(我只发布前几行):
reference.conf @ file:/var/task/reference.conf:804:无法解析 替换为值:$ {akka.stream.materializer}: com.typesafe.config.ConfigException $ UnresolvedSubstitution com.typesafe.config.ConfigException $ UnresolvedSubstitution: reference.conf @ file:/var/task/reference.conf:804:无法解析 替换为值:$ {akka.stream.materializer} at com.typesafe.config.impl.ConfigReference.resolveSubstitutions(ConfigReference.java:111) 在 com.typesafe.config.impl.ResolveContext.realResolve(ResolveContext.java:179) 在 com.typesafe.config.impl.ResolveContext.resolve(ResolveContext.java:142)
我在Lambda中执行它之前解压缩了jar,并碰巧看到所有的依赖项都在那里。我无法弄清楚哪里出错了?
任何帮助都可以得到赞赏。
答案 0 :(得分:12)
您需要在pom中添加此代码 - &gt; maven-shaded-plugin - &gt;配置部分:
<transformers>
<!-- append default configs -->
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>reference.conf</resource>
</transformer>
</transformers>
答案 1 :(得分:2)
能够最终解决这个问题,这是我的pom中的一些主要版本问题。然后,我将所有依赖项降级为Flink 1.3.2
,并在<relocations>
插件中添加了shade
。它现在有效。我正在附上整个pom,所以有一天它会帮助某人:
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.ink.FlinkLambdaTest.FlinkToLambda</mainClass>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>reference.conf</resource>
</transformer>
</transformers>
<relocations>
<relocation>
<pattern>org.codehaus.plexus.util</pattern>
<shadedPattern>org.shaded.plexus.util</shadedPattern>
<excludes>
<exclude>org.codehaus.plexus.util.xml.Xpp3Dom</exclude>
<exclude>org.codehaus.plexus.util.xml.pull.*</exclude>
</excludes>
</relocation>
</relocations>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-table_2.10</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_2.10</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients_2.10</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-scala_2.10</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-scala_2.10</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
确保使用您的主类更改。
答案 2 :(得分:0)
在gradle中:
buildscript {
repositories {
maven {
url 'https://plugins.gradle.org/m2/'
}
}
dependencies {
classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
}
}
apply plugin: 'com.github.johnrengelman.shadow'
然后,在聚合akka dependcies的项目中:
shadowJar {
include 'reference.conf'
}
有了这个,你应该能够正常构建(例如通过调用汇编和构建任务)。
Intellij IDEA也支持这一点。 FTW!它还支持下面的SBT结构。
lazy val assemblySettings = Seq(
assemblyJarName in assembly := name.value + ".jar",
assemblyMergeStrategy in assembly := {
case PathList("META-INF", xs @ _*) => MergeStrategy.discard
case _ => MergeStrategy.first
})
答案 3 :(得分:0)
这可能会晚一点,但这是flink website对此主题的回答。
还将排除有关META-INF文件夹的信息,这可能会在使用jar时引起安全问题。
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>com.google.code.findbugs:jsr305</exclude>
<exclude>org.slf4j:*</exclude>
<exclude>log4j:*</exclude>
</excludes>
</artifactSet>
<filters>
<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>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>my.programs.main.clazz</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
答案 4 :(得分:0)
对于SBT用户,这对我有用。
assemblyMergeStrategy in assembly := {
{
case PathList("META-INF", xs@_*) => MergeStrategy.discard
case "reference.conf" => MergeStrategy.concat
case x => MergeStrategy.first
}
}