Memcached bucket still fails with all workloads

Attaching all the tests ran against memcached buckets.

1) Basic tests - the gets fail, whereas the sets pass.

2) Failover and readd - Here there are many assertion errors with the I/O being problematic

3) Rebalance - Here there are many assertion errors with the I/O being problematic

In 2nd and 3rd cases, the probable cause may be the following -

[SDKD(WARNING) 268.72 cbsdk.sdkd.local executor.py:66] Exception in thread "Memcached IO over

" java.lang.AssertionError: Attempting to overwrite channel
[SDKD(WARNING) 268.72 cbsdk.sdkd.local executor.py:66] at net.spy.memcached.protocol.TCPMemcachedNodeImpl.setChannel(TCPMemcachedNodeImpl.java:496)

4) Failover - Here there are failures in the rebalance phase, bt the rebound phase breaks in SDKD. Another SDKD issue is filed to take care of the same.

We also need to investigate the SDKD code. There might be something wrong there in handling the memcached buckets. But, till now the issue looks more likely to be with the java sdk.