我最近在我的Windows 10 PC上重新安装了Netbeans IDE，以便恢复一些不相关的配置。当我尝试检查新插件以便能够下载Sakila示例数据库时，I get this error.
我已经在“无代理”和“使用代理设置”上测试了连接，两个连接都测试了seem to end succesfully.
我已经允许Netbeans通过我的防火墙，但这也没有改变任何东西。
我还没有接触我的代理配置，所以它是默认的（自动检测）。关闭自动检测也不会改变任何东西，不管我在NetBeans上有什么代理配置。
以下是我的日志文件的一部分，可能会有所帮助：

Compiler: HotSpot 64-Bit Tiered Compilers
Heap memory usage: initial 32,0MB maximum 910,5MB
Non heap memory usage: initial 2,4MB maximum -1b
Garbage collector: PS Scavenge (Collections=12 Total time spent=0s)
Garbage collector: PS MarkSweep (Collections=3 Total time spent=0s)
Classes: loaded=6377 total loaded=6377 unloaded 0
INFO [org.netbeans.core.ui.warmup.DiagnosticTask]: Total memory 17.130.041.344
INFO [org.netbeans.modules.autoupdate.updateprovider.DownloadListener]: Connection content length was 0 bytes (read 0bytes), expected file size can`t be that size - likely server with file at http://updates.netbeans.org/netbeans/updates/8.0.2/uc/final/distribution/catalog.xml.gz?unique=NB_CND_EXTIDE_GFMOD_GROOVY_JAVA_JC_MOB_PHP_WEBCOMMON_WEBEE0d55337f9-fc66-4755-adec-e290169de9d5_bf88d09e-bf9f-458e-b1c9-1ea89147b12b is temporary down
INFO [org.netbeans.modules.autoupdate.ui.Utilities]: Zero sized file reported at http://updates.netbeans.org/netbeans/updates/8.0.2/uc/final/distribution/catalog.xml.gz?unique=NB_CND_EXTIDE_GFMOD_GROOVY_JAVA_JC_MOB_PHP_WEBCOMMON_WEBEE0d55337f9-fc66-4755-adec-e290169de9d5_bf88d09e-bf9f-458e-b1c9-1ea89147b12b
java.io.IOException: Zero sized file reported at http://updates.netbeans.org/netbeans/updates/8.0.2/uc/final/distribution/catalog.xml.gz?unique=NB_CND_EXTIDE_GFMOD_GROOVY_JAVA_JC_MOB_PHP_WEBCOMMON_WEBEE0d55337f9-fc66-4755-adec-e290169de9d5_bf88d09e-bf9f-458e-b1c9-1ea89147b12b
	at org.netbeans.modules.autoupdate.updateprovider.DownloadListener.doCopy(DownloadListener.java:155)
	at org.netbeans.modules.autoupdate.updateprovider.DownloadListener.streamOpened(DownloadListener.java:78)
	at org.netbeans.modules.autoupdate.updateprovider.NetworkAccess$Task$1.run(NetworkAccess.java:111)
Caused: java.io.IOException: Zero sized file reported at http://updates.netbeans.org/netbeans/updates/8.0.2/uc/final/distribution/catalog.xml.gz?unique=NB_CND_EXTIDE_GFMOD_GROOVY_JAVA_JC_MOB_PHP_WEBCOMMON_WEBEE0d55337f9-fc66-4755-adec-e290169de9d5_bf88d09e-bf9f-458e-b1c9-1ea89147b12b
	at org.netbeans.modules.autoupdate.updateprovider.DownloadListener.notifyException(DownloadListener.java:103)
	at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogCache.copy(AutoupdateCatalogCache.java:246)
	at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogCache.writeCatalogToCache(AutoupdateCatalogCache.java:99)
	at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogProvider.refresh(AutoupdateCatalogProvider.java:154)
	at org.netbeans.modules.autoupdate.services.UpdateUnitProviderImpl.refresh(UpdateUnitProviderImpl.java:180)
	at org.netbeans.api.autoupdate.UpdateUnitProvider.refresh(UpdateUnitProvider.java:196)
[catch] at org.netbeans.modules.autoupdate.ui.Utilities.tryRefreshProviders(Utilities.java:433)
	at org.netbeans.modules.autoupdate.ui.Utilities.doRefreshProviders(Utilities.java:411)
	at org.netbeans.modules.autoupdate.ui.Utilities.presentRefreshProviders(Utilities.java:405)
	at org.netbeans.modules.autoupdate.ui.UnitTab$14.run(UnitTab.java:806)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

这可能是因为更新服务器刚刚关闭;我也没能测试这个。但也可能是我的配置出了问题。我要疯了！！