我运行在Heroku上使用webapp-runner
的战争。我通过部署以下命令使用heroku-maven-plugin
1.2版应用程序:mvn heroku:deploy-war
。最初,该应用程序可以工作,所有终端都会返回有效的响应。但是,如果我让该应用足够长的Heroku把它睡觉,然后调用它调用到番石榴终点闲着我收到NoSuchMethodError
:在webapp的亚军运行Web应用程序的Heroku API调用最终失败的NoSuchMethodError然后出现NoClassDefFoundError在google.common
2017-09-23T19:19:45.388865+00:00 app[web.1]: SEVERE: Servlet.service() for servlet [jersey-serlvet] in context with path [] threw exception [org.glassfish.jersey.server.ContainerException: java.lang.NoSuchMethodError: com.google.common.base.CharMatcher.ascii()Lcom/google/common/base/CharMatcher;] with root cause
2017-09-23T19:19:45.388866+00:00 app[web.1]: java.lang.NoSuchMethodError: com.google.common.base.CharMatcher.ascii()Lcom/google/common/base/CharMatcher;
2017-09-23T19:19:45.388867+00:00 app[web.1]: at com.google.common.io.BaseEncoding$Alphabet.<init>(BaseEncoding.java:453)
2017-09-23T19:19:45.388868+00:00 app[web.1]: at com.google.common.io.BaseEncoding$Base64Encoding.<init>(BaseEncoding.java:892)
2017-09-23T19:19:45.388869+00:00 app[web.1]: at com.google.common.io.BaseEncoding.<clinit>(BaseEncoding.java:317)
...application specific stack trace
的所有后续调用相同的API产生NoClassDefFoundError
在同一点
2017-09-23T19:22:24.454901+00:00 app[web.1]: SEVERE: Servlet.service() for servlet [jersey-serlvet] in context with path [] threw exception [org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: Could not initialize class com.google.common.io.BaseEncoding] with root cause
2017-09-23T19:22:24.454903+00:00 app[web.1]: java.lang.NoClassDefFoundError: Could not initialize class com.google.common.io.BaseEncoding
...application specific stack trace
这些问题似乎表明,番石榴罐存在于编译时,但在运行时不存在。不过,我登录到Web测功机,并验证了番石榴罐子被列入我warfile
my-mbp:TrickServer me$ heroku ps:exec
Establishing credentials... done
Connecting to web.1 on ⬢ myapp...
~ $ cd target/
~/target $ ls
MyApp.war dependency mvn-dependency-list.log tomcat.52079
~/target $ jar -tf MyApp.war
...lots of dependencies...
WEB-INF/lib/google-oauth-client-1.20.0.jar
WEB-INF/lib/gson-2.2.4.jar
WEB-INF/lib/guava-23.0.jar <---guava
WEB-INF/lib/guava-jdk5-13.0.jar
...lots more dependencies...
我努力解释为什么端点的应用程序部署后立即工作,但后来产生这些错误。对我来说,这种行为似乎表明,Heroku的是可能提供不同的类路径时,我的应用程序从睡眠状态时比最初运行醒来或Heroku的移动/清理番石榴jar文件。
我Procfile
内容:
web: java $JAVA_OPTS -jar target/dependency/webapp-runner.jar --port $PORT --expand-war target/MyApp.war
Java进程捉迷藏在我的网页DYNO:
~/target $ ps -ef | grep java
u30439 4 1 0 18:50 ? 00:00:44 java -Xmx300m -Xss512k -Dfile.encoding=UTF-8 -Duser.timezone=UTC -jar target/dependency/webapp-runner.jar --port 52079 target/MyApp.war
u30439 27 4 0 18:50 ? 00:00:00 bash --login -c java $JAVA_OPTS -jar target/dependency/webapp-runner.jar $WEBAPP_RUNNER_OPTS --port 52079 target/MyApp.war
更新1
因为我调用我的web应用程序与--expand-war
说法我还检查了扩展目录中的jar文件以验证番石榴是否存在。它是:
~/target/tomcat.55320/webapps/expanded/WEB-INF/lib $ ls
...dependencies...
google-oauth-client-1.20.0.jar
gson-2.2.4.jar
guava-23.0.jar
guava-jdk5-13.0.jar
...more dependencies...
更新2
我添加了以下逻辑有问题的Web服务印出类路径和它的资源:
logger.info("System Classpath: " + System.getProperty("java.class.path"));
logger.info("Runtime Classes...");
ClassLoader cl = UserService.class.getClassLoader();
URL[] urls = ((URLClassLoader) cl).getURLs();
for(URL url: urls){
logger.info(url.getFile());
}
下一次错误发生我检查了日志,让我吃惊的发现,番石榴瓶子是出现在运行时类路径!
2017-09-24T12:07:40.843438+00:00 app[web.1]: [heroku-exec] ERROR: Could not connect to proxy:
2017-09-24T12:07:40.844145+00:00 app[web.1]: [heroku-exec] ERROR: Too many reconnect attempts. Waiting 30 seconds...
2017-09-24T12:07:52.671620+00:00 app[web.1]: Sep 24, 2017 12:07:52 PM org.myorg.server.web.services.MyService authenticate
2017-09-24T12:07:52.671631+00:00 app[web.1]: INFO: System Classpath: target/dependency/webapp-runner.jar
2017-09-24T12:07:52.671931+00:00 app[web.1]: Sep 24, 2017 12:07:52 PM org.myorg.server.web.services.MyService authenticate
2017-09-24T12:07:52.671932+00:00 app[web.1]: INFO: Runtime Classes...
2017-09-24T12:07:52.672277+00:00 app[web.1]: Sep 24, 2017 12:07:52 PM org.myorg.server.web.services.MyService authenticate
2017-09-24T12:07:52.672279+00:00 app[web.1]: INFO: /app/target/tomcat.28304/webapps/expanded/WEB-INF/classes/
....
2017-09-24T12:07:52.690304+00:00 app[web.1]: Sep 24, 2017 12:07:52 PM org.myorg.server.web.services.MyService authenticate
2017-09-24T12:07:52.690306+00:00 app[web.1]: INFO: /app/target/tomcat.28304/webapps/expanded/WEB-INF/lib/google-oauth-client-1.20.0.jar
2017-09-24T12:07:52.690501+00:00 app[web.1]: Sep 24, 2017 12:07:52 PM org.myorg.server.web.services.MyService authenticate
2017-09-24T12:07:52.690503+00:00 app[web.1]: INFO: /app/target/tomcat.28304/webapps/expanded/WEB-INF/lib/guava-23.0.jar <--- Guava!!!
....
这是怎么回事?我该如何调试?