NetVault 9.2 and 10.*
NetVault server operating system: windows 2008 R2
Binary log shows the RDA device having connection problems as below:
Error 2014/10/01 15:08:33 N/A Media NetVault-Server Failed to open a RDA connection to 'test.net.local'. Error Code 27. 'Connection refused'
Error 2014/10/01 15:08:33 N/A Media NetVault-Server Failed to open a RDA connection to 'test.net.local'. Please review the RDA device details.
Error 2014/10/01 15:08:33 N/A Media NetVault-Server Failed to bring device 'DR (Test) - test.net.local' online
Error 2014/10/01 15:08:42 N/A Media NetVault-Server RDA getattr_device failed 'Connection is reset by peer'
Error 2014/10/01 15:08:42 N/A Media NetVault-Server RDA getattr_device failed 'Connection is reset by peer'
Installed patch from Microsoft Kb2764305
With Duplications We also see intermitant failures with optimized replication between DR4100 as seen below:
Background 2014/10/02 00:03:14 152 Data Plugin NetVault-Server Source and Destination devices support file level replication
Error 2014/10/02 00:03:15 152 Data Plugin NetVault-Server Replication failed 'Broken pipe'
Error 2014/10/02 00:03:15 152 Data Plugin NetVault-Server Failed stopping optimised replication 'Broken pipe'
CAUSE 1
TCP connection timeout.
CAUSE 2
One or more device added in NetVault is offline.
WORKAROUND 1
1/ Increase TcpMaxDataRetransmissions value to 25.Below is the Microsoft KB on How to change TcpMaxDataRetransmissions
https://support.microsoft.com/en-us/topic/how-to-modify-the-tcp-ip-maximum-retransmission-time-out-7ae0982a-4963-fa7e-ee79-ff6d0da73db8
On Linux servers edit /etc/sysctl.conf. Then change or add the following entry.
net.ipv4.tcp_retries2 = 25
Then run sysctl -e -p
2/ Install Microsoft patch "http://support2.microsoft.com/kb/2764305"
WORKAROUND 2
If the error points to the offline device, this can be ignored or remove the device from NetVault. Re-add it when needed and make it online.
