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ryoryosei
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herokuでデプロイしたが、404エラーになる

Q&A

MavenHerokuJSPservletデプロイ

解決したいこと

herokuの404エラー

javaのmavenプロジェクトでjspやServletを使ったWebアプリケーションを作成し、webapp-runnerを使ってherokuでデプロイできましたが、404エラーとなりました。
githubと連携してデプロイを行いました。

解決方法をご教授願いたいです。

以下ログや設定ファイルなどを記載しています。

ビルド時のログ

-----> Building on the Heroku-22 stack
-----> Using buildpack: heroku/java
-----> Java app detected
-----> Installing OpenJDK 1.8... done
-----> Installing Maven 3.9.4... done
-----> Executing Maven
$ mvn -DskipTests clean dependency:list install
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------< mavenWebapp:BandScheduler-app >--------------------
[INFO] Building BandScheduler-app Maven Webapp 0.0.1-SNAPSHOT
[INFO] from pom.xml
[INFO] --------------------------------[ war ]---------------------------------
[INFO]
[INFO] --- clean:3.1.0:clean (default-clean) @ BandScheduler-app ---
[INFO] Deleting /tmp/build_2b549e44/target
[INFO]
[INFO] --- dependency:3.6.0:list (default-cli) @ BandScheduler-app ---
[INFO]
[INFO] --- resources:3.0.2:resources (default-resources) @ BandScheduler-app ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /tmp/build_2b549e44/src/main/resources
[INFO]
[INFO] --- compiler:3.8.0:compile (default-compile) @ BandScheduler-app ---
[INFO] No sources to compile
[INFO]
[INFO] --- resources:3.0.2:testResources (default-testResources) @ BandScheduler-app ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /tmp/build_2b549e44/src/test/resources
[INFO]
[INFO] --- compiler:3.8.0:testCompile (default-testCompile) @ BandScheduler-app ---
[INFO] No sources to compile
[INFO]
[INFO] --- surefire:2.22.1:test (default-test) @ BandScheduler-app ---
[INFO] Tests are skipped.
[INFO]
[INFO] --- war:3.2.2:war (default-war) @ BandScheduler-app ---
[INFO] Packaging webapp
[INFO] Assembling webapp [BandScheduler-app] in [/tmp/build_2b549e44/target/BandScheduler-app]
[INFO] Processing war project
[INFO] Webapp assembled in [31 msecs]
[INFO] Building war: /tmp/build_2b549e44/target/BandScheduler-app.war
[INFO]
[INFO] --- dependency:3.6.0:copy (default) @ BandScheduler-app ---
[INFO] Configured Artifact: com.heroku:webapp-runner:9.0.41.0:jar
[INFO] Copying webapp-runner-9.0.41.0.jar to /tmp/build_2b549e44/target/dependency/webapp-runner.jar
[INFO]
[INFO] --- install:2.5.2:install (default-install) @ BandScheduler-app ---
[INFO] Installing /tmp/build_2b549e44/target/BandScheduler-app.war to /tmp/codon/tmp/cache/.m2/repository/mavenWebapp/BandScheduler-app/0.0.1-SNAPSHOT/BandScheduler-app-0.0.1-SNAPSHOT.war
[INFO] Installing /tmp/build_2b549e44/pom.xml to /tmp/codon/tmp/cache/.m2/repository/mavenWebapp/BandScheduler-app/0.0.1-SNAPSHOT/BandScheduler-app-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.692 s
[INFO] Finished at: 2024-07-26T09:30:19Z
[INFO] ------------------------------------------------------------------------
-----> Discovering process types
Procfile declares types -> web
-----> Compressing...
Done: 102.6M
-----> Launching...
Released v4
https://～herokuapp.com/ deployed to Heroku
This app is using the Heroku-22 stack, however a newer stack is available.
To upgrade to Heroku-24, see:
https://devcenter.heroku.com/articles/upgrading-to-the-latest-stack

heroku logsの出力

2024-07-26T09:14:50.000000+00:00 app[api]: Build succeeded
2024-07-26T09:14:50.428830+00:00 heroku[web.1]: Starting process with command java $JAVA_OPTS -jar target/dependency/webapp-runner.jar --port 53600 target/*.war
2024-07-26T09:14:51.010747+00:00 app[web.1]: Setting JAVA_TOOL_OPTIONS defaults based on dyno size. Custom settings will override them.
2024-07-26T09:14:51.013812+00:00 app[web.1]: Picked up JAVA_TOOL_OPTIONS: -XX:MaxRAM=536870912 -Xmx300m -Xss512k -XX:CICompilerCount=2 -Dfile.encoding=UTF-8
2024-07-26T09:14:51.226604+00:00 app[web.1]: Expanding BandScheduler-app.war into /app/target/tomcat.53600/webapps/expanded
2024-07-26T09:14:51.226641+00:00 app[web.1]: Adding Context for /app/target/tomcat.53600/webapps/expanded
2024-07-26T09:14:51.481793+00:00 app[web.1]: org.apache.coyote.AbstractProtocol init
2024-07-26T09:14:51.481805+00:00 app[web.1]: INFO: Initializing ProtocolHandler ["http-nio-53600"]
2024-07-26T09:14:51.497480+00:00 app[web.1]: org.apache.catalina.core.StandardService startInternal
2024-07-26T09:14:51.497481+00:00 app[web.1]: INFO: Starting service [Tomcat]
2024-07-26T09:14:51.497872+00:00 app[web.1]: org.apache.catalina.core.StandardEngine startInternal
2024-07-26T09:14:51.497873+00:00 app[web.1]: INFO: Starting Servlet engine: [Apache Tomcat/9.0.41]
2024-07-26T09:14:51.598459+00:00 app[web.1]: org.apache.catalina.startup.ContextConfig getDefaultWebXmlFragment
2024-07-26T09:14:51.598461+00:00 app[web.1]: INFO: No global web.xml found
2024-07-26T09:14:51.646994+00:00 heroku[web.1]: State changed from starting to up
2024-07-26T09:14:52.872249+00:00 app[web.1]: org.apache.jasper.servlet.TldScanner scanJars
2024-07-26T09:14:52.872260+00:00 app[web.1]: INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2024-07-26T09:14:52.903607+00:00 app[web.1]: org.apache.coyote.AbstractProtocol start
2024-07-26T09:14:52.903610+00:00 app[web.1]: INFO: Starting ProtocolHandler ["http-nio-53600"]
2024-07-26T09:14:53.676895+00:00 heroku[router]: at=info method=GET path="/" host=～herokuapp.com request_id=905d189f-b159-4fdd-9f69-be9e7d31800e fwd="124.150.215.183" dyno=web.1 connect=0ms service=23ms status=404 bytes=906 protocol=https
2024-07-26T09:14:53.965462+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=～herokuapp.com request_id=bb2dc468-2742-4102-aae3-62dc06d3a4b4 fwd="124.150.215.183" dyno=web.1 connect=0ms service=2ms status=404 bytes=917 protocol=https
2024-07-26T09:14:56.125958+00:00 heroku[router]: at=info method=GET path="/" host=～herokuapp.com request_id=d6744ba4-e911-488c-9d9d-2f241fe1081e fwd="210.139.253.197" dyno=web.1 connect=0ms service=2ms status=404 bytes=906 protocol=https

404エラーの画像

スクリーンショット 2024-07-26 181504.png

pom.xml

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>mavenWebapp</groupId>
  <artifactId>BandScheduler-app</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>BandScheduler-app Maven Webapp</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    
    
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
      <scope>provided</scope>
    </dependency>
	
	
    <dependency>
      <groupId>com.mysql</groupId>
      <artifactId>mysql-connector-j</artifactId>
      <version>9.0.0</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>BandScheduler-app</finalName>
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        
        <plugin>
          <groupId>com.heroku.sdk</groupId>
          <artifactId>heroku-maven-plugin</artifactId>
          <version>3.0.7</version>
        </plugin>

        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-dependency-plugin</artifactId>
          <executions>
            <execution>
              <phase>package</phase>
              <goals><goal>copy</goal></goals>
              <configuration>
                <artifactItems>
                  <artifactItem>
                    <groupId>com.heroku</groupId>
                    <artifactId>webapp-runner</artifactId>
                    <version>9.0.41.0</version>
                    <destFileName>webapp-runner.jar</destFileName>
                  </artifactItem>
                </artifactItems>
              </configuration>
            </execution>
          </executions>
        </plugin>
      </plugins>
  </build>
</project>

web.xml

web.xml
<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  
  <display-name>BandScheduler</display-name>

  <welcome-file-list>
    <welcome-file>Login.jsp</welcome-file>
  </welcome-file-list>


  <servlet>
      <servlet-name>jsp</servlet-name>
      <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
      <init-param>
          <param-name>fork</param-name>
          <param-value>false</param-value>
      </init-param>
      <load-on-startup>3</load-on-startup>
  </servlet>

  <servlet-mapping>
      <servlet-name>default</servlet-name>
      <url-pattern>*.jsp</url-pattern>
  </servlet-mapping>


  <servlet>
    <description></description>
    <display-name>LoginServlet</display-name>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>control.LoginServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>LoginServlet</servlet-name>
    <url-pattern>/login-servlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <description></description>
    <display-name>SignupServlet</display-name>
    <servlet-name>SignupServlet</servlet-name>
    <servlet-class>control.SignupServlet</servlet-class>
  </servlet>
    
  <servlet-mapping>
    <servlet-name>SignupServlet</servlet-name>
    <url-pattern>/signup-servlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <description></description>
    <display-name>DaysServlet</display-name>
    <servlet-name>DaysServlet</servlet-name>
    <servlet-class>control.DaysServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DaysServlet</servlet-name>
    <url-pattern>/days-servlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <description></description>
    <display-name>FormServlet</display-name>
    <servlet-name>FormServlet</servlet-name>
    <servlet-class>control.FormServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>FormServlet</servlet-name>
    <url-pattern>/form-servlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <description></description>
    <display-name>ConfirmServlet</display-name>
    <servlet-name>ConfirmServlet</servlet-name>
    <servlet-class>control.ConfirmServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ConfirmServlet</servlet-name>
    <url-pattern>/confirm-servlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <description></description>
    <display-name>DeleteServlet</display-name>
    <servlet-name>DeleteServlet</servlet-name>
    <servlet-class>control.DeleteServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>DeleteServlet</servlet-name>
    <url-pattern>/delete-servlet</url-pattern>
  </servlet-mapping>
  
</web-app>

Procfile

 web: java $JAVA_OPTS -jar target/dependency/webapp-runner.jar --port $PORT target/*.war

system.properties

system.properties
java.runtime.version=1.8

自分で試したこと

・デプロイして生成されたURLのすぐ後に「/Login.jsp」を記述。

・web.xmlにorg.apache.jasper.servlet.JspServletを追加。

・jspファイルがsrc/main/webappの配下にあるかどうかの確認。

・WARファイルができているかどうかの確認。

宜しくお願い致します。

0

1Answer

SurferOnWww
@SurferOnWww

404エラーとなりました。

404 エラーということは、クライアントからは要求が出て、Web サーバーに要求が届いて、Web サーバーは要求の url に指定されたリソースを探したが見つからなかったので、HTTP 404 Not Found 応答をクライアントに返したということです。

つまり、名前解決はできていて、インターネットを通じてクライアントとサーバーの間の HTTP 通信はできていて、要求はサーバーに届いて、サーバーは動いているというところまでは確認できたということです。

404 応答の原因は、自分がここのような Q&A サイトで聞く限りですが、ほとんどが url が間違っているということでした。

そのあたりに着目して調べてみてはいかがですか？

質問の画像のエラーメッセージを見ると "The requested resource [/] is not available" ということで、サイトルートを要求しているようです。ホントにサイトルートで良いのですか？

1Like

Comments

  1. @ryoryosei

    Questioner

    ご回答ありがとうございます。

    いくつか思い当たるURLを試してみたのですが、404エラーがでました。

    スクリーンショット 2024-08-01 083000.png

    スクリーンショット 2024-08-01 083123.png

    スクリーンショット 2024-08-01 083558.png

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