【发布时间】：2021-04-21 04:39:39
【问题描述】：
我正在尝试让我的 Discord 机器人在 Heroku 上工作，但我不断收到错误消息。构建过程运行良好，但机器人无法上线。我去资源 --> 更多 --> 查看日志并看到一个错误。我将错误理解为某些方法无法识别，因此我删除了错误之一。但是另一个会弹出。代码和机器人使用 IntelliJ 在本地工作。有人可以帮我解决这个问题吗？
错误/资源日志：
2021-04-18T23:58:17.202220+00:00 app[Worker.1]: location: class Main
2021-04-18T23:58:17.226725+00:00 app[Worker.1]: src/main/java/Main.java:9: error: cannot find symbol
2021-04-18T23:58:17.226770+00:00 app[Worker.1]: jda.setActivity(Activity.listening("!help"));
2021-04-18T23:58:17.226835+00:00 app[Worker.1]: ^
2021-04-18T23:58:17.226906+00:00 app[Worker.1]: symbol: variable Activity
2021-04-18T23:58:17.226942+00:00 app[Worker.1]: location: class Main
2021-04-18T23:58:17.228071+00:00 app[Worker.1]: 5 errors
2021-04-18T23:58:17.230942+00:00 app[Worker.1]: error: compilation failed
2021-04-18T23:58:17.336252+00:00 heroku[Worker.1]: Process exited with status 1
2021-04-18T23:58:17.440163+00:00 heroku[Worker.1]: State changed from up to crashed
构建/部署日志：
-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/java
-----> Java app detected
-----> Installing JDK 15... done
-----> Installing Maven 3.6.2... done
-----> Executing Maven
$ mvn -DskipTests clean dependency:list install
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------< org.example:CalciteDiscordBot >--------------------
[INFO] Building CalciteDiscordBot 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ CalciteDiscordBot ---
[INFO] Deleting /tmp/build_6a1072dc/target
[INFO]
[INFO] --- maven-dependency-plugin:2.8:list (default-cli) @ CalciteDiscordBot ---
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ CalciteDiscordBot ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /tmp/build_6a1072dc/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ CalciteDiscordBot ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 21 source files to /tmp/build_6a1072dc/target/classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ CalciteDiscordBot ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /tmp/build_6a1072dc/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ CalciteDiscordBot ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ CalciteDiscordBot ---
[INFO] Tests are skipped.
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ CalciteDiscordBot ---
[INFO] Building jar: /tmp/build_6a1072dc/target/CalciteDiscordBot-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ CalciteDiscordBot ---
[INFO] Installing /tmp/build_6a1072dc/target/CalciteDiscordBot-1.0-SNAPSHOT.jar to /tmp/codon/tmp/cache/.m2/repository/org/example/CalciteDiscordBot/1.0-SNAPSHOT/CalciteDiscordBot-1.0-SNAPSHOT.jar
[INFO] Installing /tmp/build_6a1072dc/pom.xml to /tmp/codon/tmp/cache/.m2/repository/org/example/CalciteDiscordBot/1.0-SNAPSHOT/CalciteDiscordBot-1.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.854 s
[INFO] Finished at: 2021-04-18T23:57:57Z
[INFO] ------------------------------------------------------------------------
-----> Discovering process types
Procfile declares types -> Worker
-----> Compressing...
Done: 76.7M
-----> Launching...
Released v23
https://calcitediscordbot.herokuapp.com/ deployed to Heroku
Main.java
import net.dv8tion.jda.api.JDABuilder;
import net.dv8tion.jda.api.entities.Activity;
import javax.security.auth.login.LoginException;
public class Main {
public static void main(String[] args) throws LoginException {
JDABuilder jda = JDABuilder.createDefault("I inserted token here");
jda.setActivity(Activity.listening("!help"));
jda.build();
}
}
pom.xml
<?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>org.example</groupId>
<artifactId>CalciteDiscordBot</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.target>15</maven.compiler.target>
<maven.compiler.source>15</maven.compiler.source>
</properties>
<dependencies>
<dependency>
<groupId>net.dv8tion</groupId>
<artifactId>JDA</artifactId>
<version>4.2.0_246</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>jcenter</id>
<name>jcenter-bintray</name>
<url>https://jcenter.bintray.com</url>
</repository>
</repositories>
</project>
过程文件：
Worker: java src/main/java/Main.java
【问题讨论】：