Dow Buzzell created TS-1647:
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Summary: VMWARE cannot read from cache node marked as down
Key: TS-1647
URL: https://issues.apache.org/jira/browse/TS-1647
Project: Traffic Server
Issue Type: Bug
Components: Cache, Clustering
Reporter: Dow Buzzell
We are seeing issues related to cluster management on VMWARE. Seems like we
have a NIC going to sleep and losing packets during a read operation from a
member of the cluster, then seeing this as marked down by ATS, and stays down
until the entire cluster is restarted.. seems like idle times are at the heart
of the issue and allocating 500MHZ to each VM or pinning the CPU doesn't help
the NIC still sleeps .. TCPDUMP see's missing segments yet reports 0 packets
lost. dmesg see's PC: bad TCP reclen 0x73746174 (non-terminal)
RPC: bad TCP reclen 0x63480000 (large)
RPC: bad TCP reclen 0x633f0000 (large) under load, and ATS reports cannot read
from a cluster node and marks the node down.
WE have another datacenter where this does not happen
the difference in kernel revisions are:
Sleeping NIC Data Center RHEL 5
2.6.18-308.16.1.el5
Working Data Center
2.6.18-194.3.1.el5
WE have validated that VMWARE is running properly in this datacenter but are
trying to get a ticket open with them to look into why one configuration works
but another does not
Everything else in the two configurations are nearly identical we are going to
try and get the nic drivers updated as you can see it is the LATER Linux Kernel
version that is causing headaches..
Any ideas would really be appreciated ...
Thank you,
Dow
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