社区疑难解答 troubleshooting
本节包含社区故障诊断时的常见问题和已知问题。
已知问题 known-issues
Dispatcher重新获取失败 dispatcher-refetch-fails
将Dispatcher 4.1.5与较新版本的Jetty一起使用时，重新获取可能会在等待请求超时后导致“无法从远程服务器接收响应”。
使用Dispatcher 4.1.6或更高版本解决了此问题。
从CQ 5.4升级后无法访问论坛 cannot-access-forum-post-after-upgrading-from-cq
如果在CQ 5.4上创建论坛并发布主题，然后站点升级到AEM 5.6.1或更高版本，则尝试查看现有帖子可能会导致页面上出现错误：
非法的模式字符“a”无法将请求提供给 /content/demoforums/forum-test.html 和日志中包含以下内容：
20.03.2014 22:49:35.805 ERROR [10.177.45.32 [1395380975744] GET /content/demoforums/forum-test.html HTTP/1.1] com.day.cq.wcm.tags.IncludeTag Error while executing script content.jsp
org.apache.sling.api.scripting.ScriptEvaluationException:
at org.apache.sling.scripting.core.impl.DefaultSlingScript.call(DefaultSlingScript.java:388)
at org.apache.sling.scripting.core.impl.DefaultSlingScript.eval(DefaultSlingScript.java:171)
问题是com.day.cq.commons.date.RelativeTimeFormat的格式字符串在5.4到5.5之间发生了更改，因此不再接受“ago”的“a”。
因此，任何使用RelativeTimeFormat() API的代码都必须更改：
- 发件人:
final RelativeTimeFormat fmt = new RelativeTimeFormat("r a", resourceBundle); - 收件人:
final RelativeTimeFormat fmt = new RelativeTimeFormat("r", resourceBundle);
在“创作”和“发布”页面上，失败情况不同。 在创作时，它静默失败，只是不显示论坛主题。 发布时，会在页面上引发错误。
请参阅 com.day.cq.commons.date.RelativeTimeFormat API以了解更多信息。
常见问题 common-concerns
日志中的警告：已弃用Handlebars warning-in-logs-handlebars-deprecated
在启动期间（不是第一个，但之后的每一个），日志中可能会显示以下警告：
11.04.2014 08:38:07.223 WARN [FelixStartLevel]com.github.jknack.handlebars.Handlebars Helper 'i18n'已替换为com.adobe.cq.social.handlebars.I18nHelper@15bac645
可以安全地忽略此警告，因为 jknack.handlebars.Handlebars，用于 SCF，自带了i18n助手实用程序。 启动时，它会被替换为特定于AEM的 i18n助手. 此警告由第三方库生成，用于确认覆盖现有帮助程序。
日志中的警告： OakResourceListener processOsgiEventQueue warning-in-logs-oakresourcelistener-processosgieventqueue
发布多个社交社区论坛主题可能会导致OakResourceListener processOsgiEventQueue中的大量警告和信息日志。
可以安全地忽略这些警告。
23.04.2014 14:21:18.900 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/search-collections/ugc-sc/_m.frq/jcr:content not found, which is not expected for an added or modified node
23.04.2014 14:21:18.908 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/search-collections/ugc-sc/_m.prx/jcr:content not found, which is not expected for an added or modified node
23.04.2014 14:21:18.909 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/replication/data/1f799fb4-0aeb-4660-aadb-705657f16048/67/67699ab5-9d57-4c79-a755-2727ba9e6452/jcr:content not found, which is not expected for an added or modified node
23.04.2014 14:21:18.909 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/replication/data/1f799fb4-0aeb-4660-aadb-705657f16048/67/67699ab5-9d57-4c79-a755-2727ba9e6452/jcr:content not found, which is not expected for an added or modified node
23.04.2014 14:21:18.990 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/replication/data/1f799fb4-0aeb-4660-aadb-705657f16048/b9/b91f1690-87e8-41d8-a78e-cd2259f837c8/jcr:content not found, which is not expected for an added or modified node
23.04.2014 14:21:18.990 *WARN* [pool-5-thread-3] org.apache.sling.jcr.resource.internal.OakResourceListener processOsgiEventQueue: Resource at /var/replication/data/1f799fb4-0aeb-4660-aadb-705657f16048/b9/b91f1690-87e8-41d8-a78e-cd2259f837c8/jcr:content not found, which is not expected for an added or modified node
日志错误：IndexElementFactory的NoClassDefFoundError error-in-logs-noclassdeffounderror-for-indexelementfactory
将AEM 5.6.1升级到最新的cq-socialcommunities-pkg-1.4.x或升级到AEM 6.0会导致日志文件中出现错误。 此问题在启动期间发生，针对一种条件自动解析，其证据为重新启动时未看到错误。
14.11.2013 20:52:39.453 ERROR [Apache Sling JCR Resource Event Queue Processor for path '/'] com.adobe.cq.social.storage.index.impl.IndexService Error occurred while processing event java.util.ConcurrentModificationException
14.11.2013 20:52:40.716 ERROR [OsgiInstallerImpl] com.adobe.cq.social.cq-social-commons [CommentListProvider] Error during instantiation of the implementation object (java.lang.NoClassDefFoundError: com/adobe/cq/social/storage/index/IndexElementFactory) java.lang.NoClassDefFoundError: com/adobe/cq/social/storage/index/IndexElementFactory
14.11.2013 20:52:40.717 ERROR [OsgiInstallerImpl] com.adobe.cq.social.cq-social-commons [CommentListProvider] Failed creating the component instance; see log for reason
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