Active Directory Replication Error 8451
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may have a replication issue so I started looking into it and to give a brief background of the environment.. we have almost 48 Windows 2008 R2 domain controllers globally, so we needed to find how to force active directory replication out where and how the replication is broken.. Now, i needed a tool that can active directory replication command go and check all domain controllers to summarize the replication inbound and outbound replication status.. so Ipulled up "REPADMIN"to find out active directory replication server 2012 the inbound and outbound replication status of my domain.. I ran "repadmin /replsummary" and i started counting dots on the command screen which represent the progress. So after few minutes of processing, I had a summary https://support.microsoft.com/en-us/kb/2645996 report of the servers and unfortunately i found one of our DCs hasn't replicated in last 16 hrs (quite worrying, huh!! ). But just next to it had a reason of the failure which said "The replication operation encountered a database error" Oopps, this is getting interesting now.. So, i logged in to the Domain Controller reporting database issue to investigate further and fix it. The directory service Event log showed me Database http://asknicks.blogspot.com/2013/05/active-directory-database-corruption.html index corruption errors.. hmm interesting.. Log Name: Directory Service Source: NTDS ISAM Date: 10.5.2013 10:03:21 Event ID: 467 Task Category: Database Corruption Level: Error Keywords: Classic User: N/A Computer: Test.domain.local Description: NTDS (492) NTDSA: Database C:\Windows\NTDS\ntds.dit: Index DRA_USN_index of table datatable is corrupted (0). Corrupt database? This willdefinitelyskip a heartbeat of most of the AD administrators.. :( so we ran little PowerShell script to quickly check all domain controllers for Event ID 467 and make sure we are not spreading the corruption over to other servers. Thankfully no other DC isexperiencingthe corruption.. Generally, the corruption can be caused by numerous reasons but i had few in my mind that requires a check there and then... Hardware Outdated Drivers/firmware especially disk controller & controller cache. Sudden power loss Lingering objects Time to fix it then.. most of the time the Domain Administrators prefer to go ahead and rebuild the domain controller and sync everything back, but the real concern is how many changes does this box hold and what would be the impact if we go ahead with demote andre promoteof the server.. hmm, so in our case we decided to go a bitfurtherand look for clues to fix the issue instead of going for a demotion.... So, the questio
Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for https://www.experts-exchange.com/questions/28234485/Replication-Issue-on-Additional-Domain-Controller-Windows-2008-R2.html a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions https://community.spiceworks.com/topic/523830-ad-messed-up-after-power-outage > Replication Issue on Additional Domain Controller Windows 2008 R2 Want to Advertise Here? Solved Replication Issue on Additional Domain Controller Windows 2008 R2 Posted on 2013-09-09 MS Legacy OS MS active directory Server OS Active Directory 1 Verified Solution 27 Comments 2,054 Views Last Modified: 2013-11-15 We have 4 Domain Controllers (ABCDCQ1,ABCDCQ2,ABCDCQ3 and ABCDCQ4). In that ABCDCQ1 having all 5 fsmo roles. It’s single domain environment. We are getting replication error on ABCDCQ2 , this domain controller having Additional Domain Controller role only. We want to resolve replication issue on ABCDCQ2.Result of repadmin /showrepl which we active directory replication ran on ABCDCQ2 is attached and PFA. We are getting replication error on DomainDnsZones partition only rest shows successful. Please assist us to resolve replication issue on ABCDCQ2. Replication-issue-on-Additional-.doc 0 Question by:ShailendraJadhav Facebook Twitter LinkedIn Google LVL 38 Active today Best Solution byfootech Have you already looked at Microsoft's guidance for this? They provide troubleshooting steps and resolutions. http://support.microsoft.com/kb/2645996 You could just demote and repromote, but it's better Go to Solution 27 Comments Message Author Comment by:ShailendraJadhav2013-09-09 Would you please look in to this at earliest. We want to provide solution as early as possible to our client. 0 LVL 38 Overall: Level 38 Active Directory 18 MS Legacy OS 8 MS Server OS 8 Message Active today Accepted Solution by:footech2013-09-09 Have you already looked at Microsoft's guidance for this? They provide troubleshooting steps and resolutions. http://support.microsoft.com/kb/2645996 You could just demote and repromote, but it's better to find out the actual cause if possible to help prevent it from happening again. 0 LVL 53 Overall: Level 53 Active Directory 32 MS Server OS 11 MS Legacy OS 10 Message Active 6 days ago Expert Comm
account only takes a few minutes. Join Now Photo credit: Douglas Muth We had some power outages last Wedneday that caused my vm's to go down. I have only been at the company 6 weeks and found out that our switch where the host and SAN is plugged into was not on the newer UPS so all vm's were not gracefully shutdown. I had a user come to me on Friday saying that he was trying to email someone and it bounced back yet I could email them just fine. So I started digging into it and found errors in the event logs. I am not an AD expert and pretty much all of my experience with AD is user management and some GP management so I will need some hand-holding. My hope is someone can help me determine if I have big problems or if it is something that someone can get me through. It appears something in AD got corrupted. It seems an deleted printer object is also causing some issues as well. I have attached the dcdiag and replmon outputs. Thanks in advance! dcdiagandreplmon.zip (12.8 KB) Reply Subscribe View Best Answer RELATED TOPICS: Preparing for a power outage Power Outage Power Outage!   15 Replies Pure Capsaicin OP Little Green Man Jun 22, 2014 at 7:49 UTC Do you have any backups? 1 Pure Capsaicin OP Little Green Man Jun 22, 2014 at 7:55 UTC Do a clean shutdown of each and then start up the systems starting with the very first DC you have. The errors I was seeing appears that you have a lot of VPN clients that need to be manually disconnected (why do you have VPN clients connecting to the DC?). I would also take note of the system resources, make sure you have enough disk space, RAM etc. available. You will also want to check the log files too for additional clues. 0 Poblano OP jeremymiller2 Jun 22, 2014 at 8:02 UTC Bill Kindle wrote: Do you have any backups? Yes, I should be in good shape in that regard. 0 Pure Capsaicin OP Little Green Man Jun 22, 2014 at 8:09 UTC Going back to that user, if you were able to email the customer without issue, then they have done something wrong on their end. Have the user show you what isn't working correctly, it could be just a typo, DCDIAG isn't the tool for that symptom. This doesn't mean that you shouldn't also keep investigating and fixing the errors you stumbled up on running DCDIAG. So the way I see it currently, you have two different problems. 0 Poblano OP jeremymiller2 Jun 22, 2014 at 8:09 UTC Bill Kindle w