Write Failure due to packet loss

Hi All,
Is it possible to occur a cache put failure due to packet loss. The below JMX report log (network-health-detail.txt) shows that TX success as 0.9999 for NodeId(8 PROXY node) and RxSuccess shows 0.9999 (node id 9 which is a STORAGE) exactly the same time.
At the same time I have inserted a cache item which went missing in the cache.
Is it possible to correlate the cache loss with the below data.
Please correct me if my understanding is work. Really looking forward for some expert look at this.
Regards
Srinivas
Batch Counter Report Time RefreshTime Node Id Tx Success Rx Success PacketsSent Current Packets Sent PacketsResent Current Packet Resent PacketsRepeated Current Repeated PacketsReceived Current Packets Received
24962 Thu May 05 15:54:37 BST 2011 Thu May 05 15:54:37 BST 2011 8 0.9999806938625789 1.0 116249593 51797.0 20 1.0 179 0.0 479093147 107230.0
24962 Thu May 05 15:54:37 BST 2011 Thu May 05 15:54:37 BST 2011 9 1.0 0.9999898626387551 110148867 169211.0 118 0.0 61.0 55759817 98645.0

It is more likely that you had other issues that caused your data to go "missing". Lost packets would be resent anyway so should get there eventually. The success rates of 0.9999 would be fine, you would be lucky to get a success rate of 1.0 all the time unless your cluster was not doing much.
When you say the data goes "missing" what do you mean. Presumably you do a put to get data into the cache, how to you try to get it back - a get or a query using a Filter.
What classes are you using for the keys - this can be important and can affect whether your cache works as you expect it to.
JK

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By the way, I agree with sybrand: you need to tune
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Regards
Ignacio
http://oracledisect.blogspot.com
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Kevin Closson wrote a couple blog entries that examined the potential problems of insufficient CPU capacity and its effects on log file parallel write when writing to solid state disks, and even when writing redo was explicitly disabled:
http://kevinclosson.wordpress.com/2007/07/21/manly-men-only-use-solid-state-disk-for-redo-logging-lgwr-io-is-simple-but-not-lgwr-processing/
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JesusLuvR,
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Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

Packet Loss?? Need help!

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Hi Jammydogerman,
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ORA-12571-TNS: PACKET WRITER FAILURE

Hi All,
am using oracle 6i and facing this problem when am connecting Forms to Database..
Error Encounterd:ORA-12571-TNS: PACKET WRITER FAILURE.
Plz help.
Regards,
Neha

this error usually network problem..... i googled it found some solutions try
his is usually due to an improper sqlnet.ora setting. Here are some possible causes and remedies:
** Loose network cables. This error has been observed when there was a loose cable connection to the SCSI disk array (on an Oracle Parallel Server system). Related errors were also subsequently noted in the NT event log.*
** IP address conflict (Oracle 9.0.1).*
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SQLNET.AUTHENTICATION_SERVICES= (NTS)
to
SQLNET.AUTHENTICATION_SERVICES= (NONE)
After saving the updated file, he was able to hit the retry button on the install and the creation of the database succeeded.

'ORA-12571: TNS:packet writer failure' error while calling procedure from VC++

hi all,
i am writing stored procedures and calling these from vc++. I have one stored procedure in that all
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thanks in advance,
with regards
vali.

Hi
We recently changed our load balancer to a new load balancer. we get this error only after the load balancer change.
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ORA-12571: TNS:packet writer failure while calling procedure from VC++

hi all,
i am writing stored procedures and calling these from vc++. I have one stored procedure in that all
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thanks in advance,
with regards
vali.

hi,
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So
shud i uninstall the antivirus on this And this is the only solution to it ?
If yes, then how do i fix it again when i'll reinstall it Bcoz i need Antivirus as well.
kindly suggest.
thanks
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Packet Writer Failure Error

Hi All:
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Has anyone experienced this problem? This is a first for me...
Many thanks.
Gail

Gail,
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SQLNET.EXPIRE_TIME=0
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Hope this helps.
Thanks,
Selva.
null

ORA-12571 TNS PACKET WRITER FAILURE --urgent help required

I'm facing ORA-12571 TNS PACKET WRITER FAILURE error
Platform is windows 2000/ tomcat / appache server / oracle 8.1.7
This is not frequently happening. When the load increases, I'm facing this error? What type of parameters should I concentrate.
DB is running on MTS.
It is urgent.
Could anyone throw some light on it?

This question probably best belongs on the General database forum.

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Samiullah

Hi Neeraj,
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TNS-12571:TNS PACKET WRITER FAILURE

Hello Oracle Gurus,
Our Oracle 9i database is hosted somewhere else and is behind the firewall. When accessing this database through TOAD, even after 2 minutes of inactivity, we get the "TNS-12571: TNS Packet writer failure" and we have to reconnect to the database again. This occurs in all of the client machines. The Oracle 9i database's firewall is open for the ip address from which we are using TOAD/SQL*Plus.
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Packet Writer Failure

Hi,
I am experiencing the following error on a Oracle client PC:
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The networking environment seems to be 100 % OK.
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The network was OK as well as the service names. The listener was running, since other PCs were connecting without any problem. I could see in the listener trace that the connection request was being received and processed by the server like those from other PCs. So...the issue remains a mystery.
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Hello Sir/Mam,
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user7728510 wrote:
Hi,
for what i know, MSDAORA provider doesn't support Oracle data types introduced since <font face="tahoma,verdana,sans-serif" size="1" color="#000">version</font> 8, as CLOB, BLOB and so on, so i think that it uses varchar2 up to the 4k limits and then causes this error.
Have you tried with the OraOLEDB.Oracle.1 provider instead?Nice writing, Thanks for your explanation!

ORA 012571 TNS Packet Writer Failure ... ???

I have installed the Designer 6i and when I attempt to login to the designer application, I am stopped by the error ORA 012571 TNS Packet Writer Failure.
I have no idea what is causing this error, and therefore can't use the product.
Looking for any/all help
Darrell K.

This is from documentation:
TNS-12571 TNS:packet writer failure
Cause: An error occurred during a data send. This message is not normally visible to the user.
Action: For further details, turn on tracing and re-execute the operation. If the error persists, contact Oracle Customer Support
Maybe this will be a little help for you.
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Help - Newbie - getting "ORA-12571: TNS: packet writer failure" ERROR

Hi all,
Not sure where to post this, so trying for the general forum to start...
I have also searched and read all the forums for help on this already as well the Oracle documentation and anything I could find from several on-line searches, etc.
I have Oracle 8i Enterprise Edition and Oracle Forms 6i installed on Win2K. Everything worked fine when it was just Oracle 8i running, ie: connecting to the database in SQLPlus Worksheet, but when I try and connect to the database in the datablock wizard in forms I get the ORA-12571: TNS: packet writer failure error!
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Any help or suggestions are appreciated!!!
Thx in advance!
Michelle.
PS: Note to Oracle support staff if you are listening (pardon the pun). Your one line of help for ORA-12571 in the existing support files is rather similar to the Hitchhikers Guide to the Galaxy's info for Earth... After seeing how many people have posted about this problem and how few resources or real answers there are out there, you might want to consider updating the info on this error, because is deserves something more than "mostly harmless"!

This question probably best belongs on the General database forum.

Wrt310n packet loss and dhcp failure?

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I'm only using WEP, the machines have 802.11g cards, I've changed the network to 10.4.2.x (only the private side) and left almost everything else stock. The other things that have been changed are the admin password and logging has been enabled. My ISP is comcast cable. Suggestions? More info required? Anyone know how long 'til DD-WRT will work on these things?
ps-just so my skillset is known, i'm a sysadmin for a very large tech company and have been doing this type of role for over 8 years... that puts me slightly above the average home user... i think...
pps-mixed network of Linux and Windows machines
Message Edited by junk on 01-23-2008 06:47 PM

Nothing yet. I've switched back to my Netgear, for the time being. I'm hoping Linksys actually reads these forums and has a firmware update coming out soon. The Netgear works great until you hit something with a lot of jpgs (like myspace) and then it chokes for a couple minutes. I can deal with that until the first firmware update shows. Hopefully it's soon, since I hate having to box things up and send them back. I've read a few other posts about people having problems and they suggest doing a factory reset. I always change my network over to a 10.x.x.x subnet because I like to avoid common RFC1918 address spaces (geek/hacker issues). Perhaps it doesn't like dealing with class A address space...

Write Failure due to packet loss

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