Regarding Pulling out network cable from cluster node

I have two cluster nodes installed with my application.
I have pulled out the Network cable from the primary where my application is running. So the primary is not reachle from remote box.(cannot ping primary)
I have found the following error messages
SUNW,hme0 : No response from Ethernet network : Link down -- cable problem?
I have found the device group and resource group online the primary and the sun cluster does not failover to secondary node. Does Sun cluster support this scenario ?
Or do i need to any additional configuration? Can i get clarification on this

Hi Sudheer,
if you have two interfaces in your ipmpgroup, I am missing the test address.
http://docs.sun.com/app/docs/doc/819-3000/emybr?l=en&q=ipmp&a=view
states a hostname.hme0 as:
192.168.85.19 netmask + broadcast + group testgroup1 up \
addif 192.168.85.21 deprecated -failover netmask + broadcast + up
and for hotname.hme1
192.168.85.20 netmask + broadcast + group testgroup1 up \
addif 192.168.85.22 deprecated -failover netmask + broadcast + up
you can safely replace the addresses by names if they are in /etc/hosts
In this case the -failover flag for the physical of your example is wrong.
If you only have one adapter,
One line in /etc/hostname.hme0 like you stated in your example is correct.
this is from one of my clusters.
deulwork20 group sc_ipmp0 -failover
it is the ipmpgroup Sun Cluster creates for you if you do not specify anything else. so for one single adapter one line like "hadev1 group sc_ipmp0 -failover" is correct.
DEtlef

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The loss of one node from the cluster, should not impact another node. Pulling the FC cables on one node, should have no bearing and no impact at all on the other nodes in that RAC.
Unless by that action, the FC gateway/switch somehow goes pear shape as a result - and starts to push gunk and not the actual data from the storage system.

Cluster Shared Volume is no longer accessible from cluster node

Hello,
We have a 3 nodes Hyper-v Cluster running Windows Server 2012. Recently we start having error below intermittently on a node, and the VMs running on this host and LUN will power off.
Alert: Cluster Shared Volume is no longer accessible from cluster node
Source: Cluster Service
Path: HV01.itl.local
Last modified by: System
Last modified time: 12/1/2013 12:27:18 AM
Alert description: Cluster Shared Volume 'Volume1' ('Cluster_Vol1_R6') is no longer accessible from this cluster node because of error 'ERROR_TIMEOUT(1460)'. Please troubleshoot this node's connectivity to the storage device and network connectivity.
The only changes made recently is we installed VEEAM on test basis for DR replication. We switched off the Veeam server and stop the Veeam Services on the Hyper-V Hosts but we are still having same issue.
We are using an EMC SAN connected via FC as Shared storage and Powerpath as Multi-Pathing. No errors were found on the SAN.
I don't think the issue is related to the number of IO as we also experienced the issue at midnight during the week-end where no one was working.
Any help would be very much appreciated.
Thanks.
Irfan
Irfan Goolab SALES ENGINEER (Microsoft UC) MCP, MCSA, MCTS, MCITP, MCT

Hi,
Also, try to install the following recommend KBs.
Recommended hotfixes and updates for Windows Server 2012-based Failover Clusters
http://support.microsoft.com/kb/2784261
Also, there please confirm your VSS provider have the correct version.
The third party article:
VSS Provider with 2012 HyperV and CSV
https://community.emc.com/thread/170636
Thanks.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Pull out individual graph from a multiple graph waveform?

Hi all, is there a way of parsing out individual graphs from a waveform based on a given description? I know that the waveform only has the Y, t0, and t attributes, but there must be a way of doing this.
The user inputs a cluster of data per channel. What I'd like to be able to do is isolate a single graph from the waveform based on the TAG name of the channel, and show this on a separate graph.
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Solved!
Go to Solution.
Attachments:
Settings_screenshot.jpg ‏28 KB
blockpanel_screenshot.jpg ‏116 KB

Hi
Attached is the picture of how i modified your code. In the DAQ Loop case where you are creating task, use your Tag name as the channel name
In the Main Processing Loop, insdie the New DAQ case, you are reading the waveform and using a case structure. By using the Get Attribute function and reading the value of NI_ChannelName, you can get the task name of each channel read/acquired.
I had just left an indicator at the output for the Channel name. you can use it for a case strucuture or in any which way you like.
Let use know if this works.
Attachments:
waveform attribute.PNG ‏65 KB

Photoshop cs4 pull out "indented writing" from old book

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Cluster node networking

I have five node Windows Server 2008 R2 Hyper-V cluster. I put one node to Maintance mode and all VMs migrated to other hosts. I pulled out LAN cables form that node for testing (one out, waited a litte, put it back and pulled second and so on) and put
them right back on.
After that I had a lot of cluster errors and some VMs restarted.
I have put many times nodes on maintance mode and restarted / shut down them and never had any cluster problems. Why did I have now when I pulled out LAN cables?

Hi antesl,
The
failover behavior occurs because the cluster node has detect the cluster resource or node fail, such as network, storage, please refer the following related KB to confirm there have no potential single point failure configuration in your
cluster.
Failover Cluster
http://msdn.microsoft.com/en-us/library/ff650328.aspx
Failover Cluster Step-by-Step Guide: Configuring the Quorum in a Failover Cluster
http://technet.microsoft.com/zh-cn/library/cc770620(v=ws.10).aspx
How a Server Cluster Works
http://technet.microsoft.com/en-us/library/cc738051(v=ws.10).aspx
HYPER-V 2008 R2 SP1 Best Practices (In Easy Checklist Form)
http://blogs.technet.com/b/askpfeplat/archive/2012/11/19/hyper-v-2008-r2-sp1-best-practices-in-easy-checklist-form.aspx
I’m glad to be of help to you!
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Pulled network cable... RMI freezes forever??

I have RMI basically doing some remote tasks on various servers and all goes well... unless I pull a network cable out of a machine that is an RMI Server.
My client, at this point, issues a request to that "server" and sits... forever.
What I really need is a way to know that the reason it is waiting is because the server is simply not in a ready state. If I time it out somehow, the timeout may not know if it's a long process... worth sticking around for... or if it's waiting for no reason at all. So, for example, if I have a process that takes a few minutes usually... I'd like it to hang out. But I'd like it to just give up if it can't even get a connection to the machine...
What's really odd is that I'd expect some sort of exception to be thrown... but nada... it just hangs... and then actually answers the function call when I plug it back in.
I've looked through these forums and all over the place to find an answer to this issue... and have had no luck.
So, if anyone has any ideas... PLEASE help.
Thanks in advance!!

2 things.
1. there are several timeouts which will kick in eventually. Generally though they take 5-10 minutes.
2. If this is not bad code on your part, then its a function of your connection mechanism which could be due to yoru OS, or whatever is in your connection path. For instance, I connect to my rmi server, and if I pull the cable, my RMI client is aware the instant I try to make another call. Or if there is an active call it is instantly interrupted. And exception is immediately thrown in either case. However, if I am tunnelling over ssh, through an ssh client, and I pull the cable, the java program does not know instantly because my ssh client I guess does not instantly reveal this information.

If someone pulls out the LAN cable ?

I need to trap this event, and make some software handle the situation. Is there any event or message or interrupt generated when some one pulls out the LAN cable or the interface card is down ? If yes where n how can I trap one?
Ciao...

thanx, I've tried this. and the syslogd does put "hme0: Link down, cable problem?" in case I pull out the cable, but as the god (customer) wants it we need to take care of the situation if the customer gives a command like "ifconfig hme0 down" accidently!! and syslogd doesn't seem to be putting any messeges in this case. so still the problem remains half solved. any ideas.
warm regards,
Kashyap

Use XMLP to pull only specific pages from larger PDF template?

We need to be able to pull specific pages or a range of pages out of a larger template to use to merge data into and return to users or the selected delivery method. I've seen a lot of information about how to add page numbers to PDF templates / documents, but nothing about how I can pull out specific pages. We know this can be done using iText or some other technology, but does anyone know if this can be done using XML Publisher at all? This is a big issue for us and could determine whether we end up using XMLP at all or go with something else. Any info would be helpful.
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Hi
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How change state when card is inserted and pulled out

It is not Java Card question, but I think it is better place to post question like this. I have running Java Card applet on card, the communication between card and host application works, but could you anybody tell me how handle inserting and pulling card out? My idea is, I have running Java 6 SE application:
1. and I will insert the card into a reader and application will automatically find out that card was inserted and write out it.
2. and I will pull out the card from a reader and application will automatically find out that card was pulled out and write out it.
Could you anybody help me, please?
Thank you very much for any answer.
Martin

mFilo wrote:
It is not Java Card question, but I think it is better place to post question like this. I have running Java Card applet on card, the communication between card and host application works, but could you anybody tell me how handle inserting and pulling card out? My idea is, I have running Java 6 SE application:
1. and I will insert the card into a reader and application will automatically find out that card was inserted and write out it.
2. and I will pull out the card from a reader and application will automatically find out that card was pulled out and write out it.I think you can address only terminals. A way to identify a card is with additional info like ATR, CPLC data or specific applet's file control information (response to select command). I found in javax.smartcardio.CardTerminals following methods that might help:
waitForChange
public void waitForChange()
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        CardException - if the card operation failed
waitForChange
public abstract boolean waitForChange(long timeout)
                               throws CardException
    Waits for card insertion or removal in any of the terminals of this object or until the timeout expires.
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    This method is often used in a loop in combination with list(State.CARD_INSERTION), for example:
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      CardTerminals terminals = factory.terminals();
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Length of coax vs. network cable as function of performance

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choice 1:
100ft coax cable from the AP to the injector and a 25ft of network cable from the injector to the switch
OR
choice 2:
50ft coax from the AP to the injector and a 75ft of network cable from the injector to the switch,
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i am not using the cisco brand coax - i am using some cable guy who custom makes them.

Definitively is recommended to have an smaller coax cable.
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How do I get a disc out of my super drive when I forgot to eject it from the drive before pulling out the USB cable ?

how do I get a disc out of my super drive when I forgot to eject it from the drive before pulling out the USB cable ?

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I have a brand new macbook pro that i was doing a data transfer from an old macbook, it got stopped/cable pulled out, now have spinning wheel of death that wont stop, how do i reboot/stop the wheel of death and start again?

i have a brand new macbook pro that i was doing a data transfer via firewire from an old macbook, it got stopped/cable pulled out, now have spinning wheel of death that wont stop, how do i reboot/stop the wheel of death and start again? (this time il use time machine transfer)

Just power off the machine(s). Shut them down. Migration Assistant gets 'stuck' sometimes - best way to migrate really isn't over Firewire, though it will certainly work, but with both machines hardwired via Ethernet to the same router. You can use a TM backup, too, of course, provided that it's recent. Which is the best? Your choice. I've done it both ways and have a preference for MA, but TM restore can be a bit faster and less quarrelsome.
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Using the network load balancing from the nodes itself

I have installed a 2 node Sun Cluster 3.2, configured a shared ip resource and attached to it a scalable network aware resource working on the two nodes. I have crashed the process on one of the node in such a way that the cluster could not restart it again
In this status I tried to open a connection from another server and the load balancer always sent the traffic to the node that was up which is as expected...
If I try to open a connection from the node on which the process is failed then I get a connection refused meaning that the load balancer is not working in this circumstance.
Is this a bug/ a mis-configuration/ or just an inherent cluster problem.
Is there a solution to this issue?
Regards
Daniel

To answer your first question, no, there isn't anything you can do.
Here is what my colleague suggested while I was away:
Zone-clusters scalable services still require shared-IP zones, which means requests from one app to another would still bounce back due to loopback. Probably wouldn't help here.
They could isolate the services that must talk to other services into their own failover group on exclusive-IP zones. Other services can be setup as originally planned. But maybe there are too many such "dependent services" for this to be useful. Also, each failover service must have its own IP address.
Finally, can these web services be configured so that it tries multiple addresses. In that case, if the shared address foo for service X bounces back (due to X having crashed on the local node), the app itself would retry with address bar for service X? This allows for uniform configuration across all services, namely:
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    - try node 1's own address (either public or clusternode1-priv)
    - try node 2's own address
You can fine tune it so that configurations on node 1 only use node 2's address as backup, and vice versa. I don't know if that is any help.
As for your second question, the answer is that Solaris Container Clusters allow for consolidation and isolation of clusters onto a single set of nodes. Normal containers don't really allow you to consolidate complete clusters in quite the same way. See http://www.sun.com/offers/details/820-7351.html for more.
Tim
---

Cluster VMs not accessible from other node hyper-v 2012 r2

I have implementing 3 node cluster using Windows server 2012 r2 hyper-v environment, Scenario as below....
3 HP server, every server 4 NIC`s, i made team using 4 NIC`s, and Cisco switch port configured as ether-channel and trunk port.
cluster up and running across all node, suddenly i have faced that i can`t access VM when its not on the same node from where i am accessing Cluster manager. but i can access that VM only if i log on that owned node via cluster manager.\
Please help.
Thanks
Shipon

Hi Shipon,
Your network configuration not meet the cluster network requirement,
Network adapters and cable (for network communication): The network hardware, like other components in the failover cluster solution, must be marked as "Certified for Windows
Server 2008 R2." If you use iSCSI, your network adapters should be dedicated to either network communication or iSCSI, not both.
In the network infrastructure that connects your cluster nodes, avoid having single points of failure. There are multiple ways of accomplishing this. You
can connect your cluster nodes by multiple, distinct networks. Alternatively, you can connect your cluster nodes with one network that is constructed with teamed network adapters, redundant switches, redundant routers, or similar hardware that removes single
points of failure.
The related KB:
Network Recommendations for a Hyper-V Cluster in Windows Server 2012
http://technet.microsoft.com/en-us/library/dn550728.aspx
Understanding Requirements for Failover Clusters
http://technet.microsoft.com/en-us/library/cc771404.aspx
I’m glad to be of help to you!
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Regarding Pulling out network cable from cluster node

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