以下错误是服务端数据库用户权限不够导致的，请参考官方文档

官方提示：

Error 500:

Solution: OCS engine can’t comunicate with mysql server. Probably due to a wrong mysql account. You have to check z-ocsinventory-server.conf exactly theses few lines

错误信息如下

Service encounter error <OCS Inventory NG Agent encounter an error (exit code is 4 => Failed to talk with Communication Server)>. Failed to send Prolog <HTTP Status Code #500>

开始菜单右键选择事件查看器

点开Windows日志-应用程序可以看到 存在一个错误 Failed to load/parse last inventory state 右下角OCS图标右键点击run OCS inventory NG Agent now 虽然显示successfully，但是并没有收集到这个错误。 日志中多出来一个错误Service encounter error <OCS Inventory NG Agent encounter an error (exit code is 4 => Failed to talk with Communication Server)>.

查看OCSInventory.log，错误信息如下：

Starting OCS Inventory NG Agent on Tuesday, October 08, 2019 21:16:40. AGENT => Running OCS Inventory NG Agent Version 2.6.0.0 AGENT => Using OCS Inventory NG FrameWork Version 2.6.0.0 AGENT => Loading plug-in(s) AGENT => Using network connection with Communication Server AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.6.0.0> AGENT => Sending Prolog ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500> AGENT => Unloading communication provider AGENT => Unloading plug-in(s) AGENT => Execution duration: 00:00:00.