HI

i installed and configured new sharepoint 2013 farm with four servers ,

two: WFE

two: application servers

in an application servers i am receiving below error in event viewer

Log Name:      Application

Source:        Microsoft-SharePoint Products-SharePoint Foundation

Date:          9/5/2015 9:11:32 PM

Event ID:      6398

Task Category: Timer

Level:         Critical

Keywords:     

User:          xxx\spfarm

Computer:      App02.portal.com

Description:

The Execute method of job definition Microsoft.SharePoint.Administration.SPAppStateQueryJobDefinition (ID ef0346d7-57ea-412e-b2c1-b5ed1cbff37f) threw an exception. More information is included below.

Sorry, we can't seem to connect to the SharePoint Store. Try again in a bit.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-SharePoint Products-SharePoint Foundation" Guid="{6FB7E0CD-52E7-47DD-997A-241563931FC2}" />

    <EventID>6398</EventID>

    <Version>15</Version>

    <Level>1</Level>

    <Task>12</Task>

    <Opcode>0</Opcode>

    <TimeCreated SystemTime="2015-09-05T18:11:32.812875500Z" />

    <EventRecordID>29625</EventRecordID>

    <Correlation ActivityID="{170E2B9D-5682-A08A-5C02-5214C86D515C}" />

    <Execution ProcessID="8436" ThreadID="13820" />

    <Channel>Application</Channel>

    <Computer>PortalApp02.portal.com</Computer>

    <Security UserID="S-1-5-21-681022615-1803309023-368063384-1108" />

  </System>

  <EventData>

    <Data Name="string0">Microsoft.SharePoint.Administration.SPAppStateQueryJobDefinition</Data>

    <Data Name="string1">ef0346d7-57ea-412e-b2c1-b5ed1cbff37f</Data>

    <Data Name="string2">Sorry, we can't seem to connect to the SharePoint Store. Try again in a bit.</Data>

  </EventData>

</Event>

2. but in WFE server and in another applicatin server i received below error 

In one application server:

The Execute method of job definition Microsoft.SharePoint.Diagnostics.SPDiagnosticsMetricsProvider (ID 5101f9f0-4dc3-4966-b4dc-acb4fc87be9f) threw an exception. More information is included below.

An update conflict has occurred, and you must re-try this action. The object SPWebService was updated by XXX\spfarm, in the OWSTIMER (3892) process, on machine XXXAPP02.  View the tracing log for more information about the conflict.

In WFE server:

The Execute method of job definition Microsoft.SharePoint.Diagnostics.SPDiagnosticsMetricsProvider (ID 5101f9f0-4dc3-4966-b4dc-acb4fc87be9f) threw an exception. More information is included below.

An update conflict has occurred, and you must re-try this action. The object SPWebService was updated by XXX\spfarm, in the OWSTIMER (3892) process, on machine XXXAPP02.  View the tracing log for more information about the conflict.

How to solve these errors and why are they

HI

when i check the job id i found these errors are coming below job failure