将 war 文件部署到 Tomcat 时出现 Elastic Beanstalk 502 错误
Elastic Beanstalk 502 error when deploying war file to Tomcat
我已将 Shopizer war 文件部署到 Tomcat Elastic Beanstalk 实例。我已经配置了一个 mySQL 数据库，据我所知一切都应该是正确的。问题是当我尝试访问 URL 时出现 502 错误。我是 ware Elastic Beanstalk 在 60 秒后超时，所以我增加了超时限制但仍然遇到问题。
我在 Catalina.out 日志中注意到了这一点。我知道它只是一个 warning 但它可能指向我的问题吗？
2018-05-02 06:02:51.220 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@4446a77 -- APPARENT DEADLOCK!!! Complete Status:
Managed Threads: 3
Active Threads: 3
Active Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@55aa1343
on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#2
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@326b931e
on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#0
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@7fc7b7d9
on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#1
Pending Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@591e9ef6
Pool thread stack traces:
Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#2,5,main]
java.net.PlainSocketImpl.socketConnect(Native Method)
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
java.net.Socket.connect(Socket.java:589)
com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202)
com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57)
com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122)
com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619)
com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601)
com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633)
com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)
com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)
com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44)
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#0,5,main]
java.net.PlainSocketImpl.socketConnect(Native Method)
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
java.net.Socket.connect(Socket.java:589)
com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202)
com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57)
com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122)
com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619)
com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601)
com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633)
com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)
com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)
com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44)
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#1,5,main]
java.net.PlainSocketImpl.socketConnect(Native Method)
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
java.net.Socket.connect(Socket.java:589)
com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202)
com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57)
com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122)
com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619)
com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601)
com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633)
com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347)
com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)
com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44)
com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@55aa1343 (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt().
2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@326b931e (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt().
2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@7fc7b7d9 (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt().
我搞砸了好几个步骤，还没有看清楚哪些有用，哪些没用。如果我有机会经历这些并提供更具体的帮助，我会的，但现在，我就是这样做的。
在sm-shop/src/main/resources/application.properties中添加：
server.port = 5000
从创建数据库开始。您需要 database.properties 文件的详细信息。我创建了一个 mySQL Aurora 数据库。
- 将数据库属性添加到
sm-shop/src/main/resources/database.properties。
- 在 AWS 中，创建 Elastic Beanstalk 应用程序和环境。我选择了 Tomcat，因此必须构建一个 war 文件，并将其部署到环境中。
在配置 > 软ware 中设置以下内容：
Initial JVM heap size (Xms) = 1024m
Max JVM heap size (Xmx) = 1024m
XX:MaxPermSize = 256m
添加以下环境属性：
HIBERNATE_DIALECT = org.hibernate.dialect.MySQLDialect
JDBC_CONNECTION_STRING = jdbc:mysql://mydb.ptmjbhdur9pw.eu-west-2.rds.amazonaws.com:3306/SALESMANAGER?user=username&password=password&autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&&driverClass=com.mysql.cj.jdbc.Driver
SERVER_PORT = 5000
在配置 > 修改实例中：
Instance type = (at least)m1.small
EC2 安全组 - 我在这里勾选了数据库安全组。
- 在配置 > 修改容量中：
环境类型 = 负载平衡
在配置 > 负载均衡器中添加以下侦听器：
Port = 8080
Protocol = HTTP
Instance Port = 8080
Instance Protocol = HTTP
当所有这些都完成并且我在没有任何明显的 AWS 问题的情况下启动应用程序时，应用程序不会加载，所以我检查了 Catalina 日志。它显示了与 https://groups.google.com/forum/#!searchin/shopizer/ru%7Csort:date/shopizer/hQjqp_5UswI/goVKf5BTCQAJ 中相同的错误，因此我进行了更改。应用程序现在加载。
我希望这可以节省一些时间（和悲伤）。
我已将 Shopizer war 文件部署到 Tomcat Elastic Beanstalk 实例。我已经配置了一个 mySQL 数据库，据我所知一切都应该是正确的。问题是当我尝试访问 URL 时出现 502 错误。我是 ware Elastic Beanstalk 在 60 秒后超时，所以我增加了超时限制但仍然遇到问题。
我在 Catalina.out 日志中注意到了这一点。我知道它只是一个 warning 但它可能指向我的问题吗？
2018-05-02 06:02:51.220 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@4446a77 -- APPARENT DEADLOCK!!! Complete Status: Managed Threads: 3 Active Threads: 3 Active Tasks: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@55aa1343 on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#2 com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@326b931e on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#0 com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@7fc7b7d9 on thread: C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#1 Pending Tasks: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@591e9ef6 Pool thread stack traces: Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#2,5,main] java.net.PlainSocketImpl.socketConnect(Native Method) java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) java.net.Socket.connect(Socket.java:589) com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202) com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57) com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122) com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619) com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601) com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633) com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347) com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206) com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203) com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138) com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125) com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44) com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696) Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#0,5,main] java.net.PlainSocketImpl.socketConnect(Native Method) java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) java.net.Socket.connect(Socket.java:589) com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202) com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57) com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122) com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619) com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601) com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633) com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347) com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206) com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203) com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138) com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125) com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44) com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696) Thread[C3P0PooledConnectionPoolManager[identityToken->1br9tjp9v8puiagh4cnwb|550ee827]-HelperThread-#1,5,main] java.net.PlainSocketImpl.socketConnect(Native Method) java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) java.net.Socket.connect(Socket.java:589) com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202) com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57) com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122) com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619) com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601) com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:633) com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347) com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:175) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220) com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206) com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolPooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203) com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138) com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125) com.mchange.v2.resourcepool.BasicResourcePool.access0(BasicResourcePool.java:44) com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870) com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@55aa1343 (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt(). 2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@326b931e (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt(). 2018-05-02 06:03:51.222 WARN 3233 --- [-AdminTaskTimer] c.m.v.a.ThreadPoolAsynchronousRunner : Task com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@7fc7b7d9 (in deadlocked PoolThread) failed to complete in maximum time 60000ms. Trying interrupt().
我搞砸了好几个步骤，还没有看清楚哪些有用，哪些没用。如果我有机会经历这些并提供更具体的帮助，我会的，但现在，我就是这样做的。
在
sm-shop/src/main/resources/application.properties中添加：server.port = 5000从创建数据库开始。您需要 database.properties 文件的详细信息。我创建了一个 mySQL Aurora 数据库。
- 将数据库属性添加到
sm-shop/src/main/resources/database.properties。 - 在 AWS 中，创建 Elastic Beanstalk 应用程序和环境。我选择了 Tomcat，因此必须构建一个 war 文件，并将其部署到环境中。
在配置 > 软ware 中设置以下内容：
Initial JVM heap size (Xms) = 1024m Max JVM heap size (Xmx) = 1024m XX:MaxPermSize = 256m添加以下环境属性：
HIBERNATE_DIALECT = org.hibernate.dialect.MySQLDialect JDBC_CONNECTION_STRING = jdbc:mysql://mydb.ptmjbhdur9pw.eu-west-2.rds.amazonaws.com:3306/SALESMANAGER?user=username&password=password&autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&&driverClass=com.mysql.cj.jdbc.Driver SERVER_PORT = 5000在配置 > 修改实例中：
Instance type = (at least)m1.smallEC2 安全组 - 我在这里勾选了数据库安全组。- 在配置 > 修改容量中： 环境类型 = 负载平衡
在配置 > 负载均衡器中添加以下侦听器：
Port = 8080 Protocol = HTTP Instance Port = 8080 Instance Protocol = HTTP
当所有这些都完成并且我在没有任何明显的 AWS 问题的情况下启动应用程序时，应用程序不会加载，所以我检查了 Catalina 日志。它显示了与 https://groups.google.com/forum/#!searchin/shopizer/ru%7Csort:date/shopizer/hQjqp_5UswI/goVKf5BTCQAJ 中相同的错误，因此我进行了更改。应用程序现在加载。
我希望这可以节省一些时间（和悲伤）。