无法在谷歌应用引擎上部署应用程序：appengine-web.xml 不包含 <threadsafe> 元素

Question

当我点击在 netbeans 的谷歌应用引擎上部署应用程序时，这些是产生的错误消息。让我告诉你，最初，可能我输入了错误的密码并且应用程序无法部署。但是现在当我单击部署应用程序时，它不会询问我的电子邮件或密码。

无论如何我该如何解决这些错误？

Reading application configuration data...
Bad configuration: appengine-web.xml does not contain a <threadsafe> element.
See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
You probably want to enable concurrent requests.
Please see the logs [C:\Users\user\AppData\Local\Temp\appcfg6534187344911851576.log] for further information.
May 28, 2012 12:35:54 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed W:/UnderTest/NetbeansCurrent/Guestbook/build/web\WEB-INF/appengine-web.xml
May 28, 2012 12:35:54 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
SEVERE: Received exception processing W:/UnderTest/NetbeansCurrent/Guestbook/build/web\WEB-INF/appengine-web.xml
com.google.apphosting.utils.config.AppEngineConfigException: appengine-web.xml does not contain a <threadsafe> element.
See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
You probably want to enable concurrent requests.
at com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:79)
at com.google.appengine.tools.admin.Application.<init>(Application.java:139)
at com.google.appengine.tools.admin.Application.readApplication(Application.java:225)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:145)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:69)
at com.google.appengine.tools.admin.AppCfg.main(AppCfg.java:65)

编辑： 我在linux中尝试了同样的事情，这次我输入了正确的密码。然后我也得到了例外：

May 28, 2012 1:26:51 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed /home/non-admin/NetBeansProjects/Guestbook/build/web/WEB-INF/appengine-web.xml
May 28, 2012 1:26:51 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
SEVERE: Received exception processing /home/non-admin/NetBeansProjects/Guestbook/build/web/WEB-INF/appengine-web.xml
com.google.apphosting.utils.config.AppEngineConfigException: appengine-web.xml does not contain a <threadsafe> element.
See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
You probably want to enable concurrent requests.
at  com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:79)
at com.google.appengine.tools.admin.Application.<init>(Application.java:139)
at com.google.appengine.tools.admin.Application.readApplication(Application.java:225)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:145)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:69)
at com.google.appengine.tools.admin.AppCfg.main(AppCfg.java:65)
Bad configuration: appengine-web.xml does not contain a <threadsafe> element.
See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
You probably want to enable concurrent requests.
Please see the logs [/tmp/appcfg6804971430427378027.log] for further information.
Reading application configuration data...
 May 28, 2012 1:41:52 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed /home/non-admin/NetBeansProjects/Guestbook/build/web/WEB-INF/appengine-web.xml
May 28, 2012 1:41:52 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
SEVERE: Received exception processing /home/non-admin/NetBeansProjects/Guestbook/build/web/WEB-INF/appengine-web.xml
com.google.apphosting.utils.config.AppEngineConfigException: appengine-web.xml does not contain a <threadsafe> element.
See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
You probably want to enable concurrent requests.
at com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:79)
at com.google.appengine.tools.admin.Application.<init>(Application.java:139)
at com.google.appengine.tools.admin.Application.readApplication(Application.java:225)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:145)
at com.google.appengine.tools.admin.AppCfg.<init>(AppCfg.java:69)
at com.google.appengine.tools.admin.AppCfg.main(AppCfg.java:65)
 Bad configuration: appengine-web.xml does not contain a <threadsafe> element.
 See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.
 You probably want to enable concurrent requests.
 Please see the logs [/tmp/appcfg8910063489276425896.log] for further information.

Answer 1

以@alex 所说的内容为基础......

你的第一个错误日志中有

Bad configuration: appengine-web.xml does not contain a <threadsafe> element. See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.

第一行

Bad configuration: appengine-web.xml does not contain a <threadsafe> element.

告诉你什么是错的。第二行

See http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests for more information.

指出要研究 GAE 文档的哪一部分来解决您的问题。

我必须承认，错误日志条目非常清晰且很有帮助。我希望更多人可以遵循这里为您制作的示例。如果您仍然卡住，请您具体说明您卡住的是什么？

Answer 2

只需添加

<threadsafe>true</threadsafe>

到您的 war/WEB-INF/appengine-web.xml

像这样：

    <?xml version="1.0" encoding="UTF-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application></application>
<version>1</version>
<threadsafe>true</threadsafe>

Answer 3

我认为您已将此线程安全属性添加到 web.xml 而不是 appengin-web.xml。 确保将其添加到 appenginweb.xml。 谢谢。