【发布时间】：2016-08-05 14:33:51
【问题描述】：
我在我的网站上使用 Exm 订阅表格。当我点击“提交”时，什么也没有发生，我在日志中看到了这个异常：
11:47:00 ERROR unhandled exception thrown while processing task '0x479FA17B72734C448A640E959089B01F' from task pool 'sent_message_task_pool'. The task has not reached the maximum number of Attempts to process a failing task and is postponed.
Exception: System.FormatException
Message: The input is not a valid base-64 string, since they in the voids containing a non-base 64 character, more than two spaces or a character that is not valid.
Source: mscorlib
at System.Convert.FromBase64_Decode (char * startInputPtr, Int32 inputLength, Byte * startDestPtr, Int32 destLength)
at System.Convert.FromBase64CharPtr (char * inputPtr, Int32 inputLength)
at System.Convert.FromBase64String (String s)
at Sitecore.Modules.EmailCampaign.Core.Crypto.AuthenticatedAesStringCipher.TryDecrypt (String encryptedmessage)
at Sitecore.EmailCampaign.Cm.Tasks.MessageEventBaseTaskProcessor.OnProcess (Short Running Task task, CancellationToken CancellationToken)
at Sitecore.ExM.Framework.Distributed.Tasks.Processing.ShortRunning.TaskProcessor.Process(ShortRunningTask task, CancellationToken CancellationToken)
at Sitecore.ExM.Framework.Distributed.Tasks.Processing.ShortRunning.DatabaseTaskAgent.ProcessTask(DatabaseTaskDtoCollectionItem taskDto, CancellationToken CancellationToken)
11:47:01 WARN One or more tasks processed by task agent 'sent_message_task_pool' failed. The agent wants to revert to the slowest processing speed possible.
当我将 EXM 版本从 3.2 升级到 3.3 时，这种情况开始发生。在 3.2 版本中一切正常
我发现一行发生了这个异常：
string str3 = this._cipher.TryDecrypt(eventData.ContactId);
看起来缺少 ContactId(equal "00000000-0000-0000-0000-000000000000")
【问题讨论】：
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请尝试删除
\Data\viewstate 文件夹下的所有文件夹并尝试再次重现此问题 -
问题仍在复制
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我发现一行发生了这个异常：string str3 = this._cipher.TryDecrypt(eventData.ContactId);看起来缺少 ContactId(equal "00000000-0000-0000-0000-000000000000") 。应该填在哪里？
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您是否添加了所需的连接字符串，即 EXM.CryptographicKey 和 EXM.AuthenticationKey？参考文献dev.sitecore.net/Downloads/Email_Experience_Manager/…上的安装指南
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是的，我已经添加了这个值
标签： sitecore sitecore8 sitecore-exm