Error Message

Below is the error which appears on the EV admin console:

In Dtrace we see the error message below:

1600      06:08:52.119      [4136]   (EVMonitoring)                EV-H               {ESNestClient} Exception: The type initializer for 'PerTypeValues`1' threw an exception. Info:Elasticsearch, exception while flusing index : **, Exception: The type initializer for 'PerTypeValues`1' threw an exception. Diag: Type:System.TypeInitializationException ST:   at System.SpanHelpers.IsReferenceOrContainsReferences[T]()|   at Elasticsearch.Net.Extensions.NameValueCollectionExtensions.ToQueryString(NameValueCollection nv)|   at Elasticsearch.Net.RequestData.CreatePathWithQueryStrings(String path, IConnectionConfigurationValues global, IRequestParameters request)|   at Elasticsearch.Net.RequestData..ctor(HttpMethod method, String path, PostData data, IConnectionConfigurationValues global, IRequestParameters local, IMemoryStreamFactory memoryStreamFactory)|   at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters)|   at Elasticsearch.Net.ElasticLowLevelClient.DoRequest[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters)|   at Nest.ElasticClient.DoRequest[TRequest,TResponse](TRequest p, IRequestParameters parameters, Action`2 forceConfiguration)|   at Veritas.EnterpriseVault.Indexing.EVElasticsearchClient.ESNestClient.FlushIndex(String index, Boolean useWildcard) Inner:System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)|File name: 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'|   at System.SpanHelpers.PerTypeValues`1.MeasureArrayAdjustment()|   at System.SpanHelpers.PerTypeValues`1..cctor()|WRN: Assembly binding logging is turned OFF.|To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.|Note: There is some performance penalty associated with assembly bind failure logging.|To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].|

In EV 15.1, multiple third party libraries are upgraded to the latest version, which causes this issue.

This issue can be resolved by adding the lines below to the EVMontoring.exe.config file:

1. Edit the EVMonitoring.exe.config file (\Enterprise Vault).
2. Add the following lines after tag and before tag and save the file.

       3. Restart all the EV services.