Indexing Schedule Manager on Server Failed!!!

Hi All,

Below is the error message from the ULS logs regarding the Indexing service. As a result of this, I'm unable to see the Content Sources and Crawl History on Central Admin. I further found out that one of the server in our farm is in Converging Status under NLB (Network Load Balancer). Could this be the issue? But why would it say access denied. The search service account has not been modified or the permissions have never changed. Thanks in advance for any pointers.

Entering monitored scope (Timer Job Indexing Schedule Manager on WCRSPT02) 8a76f83b-9c75-48d4-8764-61fb0d93ca49
executing job Indexing Schedule Manager on <Server> 8a76f83b-9c75-48d4-8764-61fb0d93ca49
CContentSourceCollection::ValidateTrigger in m_pScheduler -> Activate or NewWorkItem, Error is 0x80070005  [contentsource.cxx:1126]  d:\office\source\search\native\gather\server\contentsource.cxx 
<Exception><HR>0x80070005</HR><eip>000007FEE2929257</eip><module>d:\office\source\search\native\gather\server\contentsource.cxx</module><line>1127</line></Exception>   
The Execute method of job definition Microsoft.Office.Server.Search.Administration.IndexingScheduleJobDefinition (ID 0141a0f4-9c0a-4aa3-901f-f0bd5bb7f51d) threw an exception. More information is included below.  Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) 8a76f83b-9c75-48d4-8764-61fb0d93ca49
Exception stack trace:    at Microsoft.Office.Server.Search.Administration.SearchApi.RunOnServer[T](CodeToRun`1 remoteCode, CodeToRun`1 localCode, Boolean useCurrentSecurityContext, Int32 versionIn)     at Microsoft.Office.Server.Search.Administration.SearchApi.GetContentSources(Int32 versionIn)     at Microsoft.Office.Server.Search.Administration.ContentSourceCollection..ctor(Content parent)     at Microsoft.Office.Server.Search.Administration.Content.get_ContentSources()     at Microsoft.Office.Server.Search.Administration.IndexingScheduleJobDefinition.Execute(Guid targetInstanceId)     at Microsoft.SharePoint.Administration.SPTimerJobInvokeInternal.Invoke(SPJobDefinition jd, Guid targetInstanceId, Boolean isTimerService, Int32& result) 8a76f83b-9c75-48d4-8764-61fb0d93ca49
Leaving Monitored Scope (Timer Job Indexing Schedule Manager on WCRSPT02). Execution Time=50.1862666903196

Regards, Kapil ***Please mark answer as Helpful or Answered after consideration***