1.0.9

Fixes missing/duplicate decree scenario

Issues involved overwriting highest_proposed_decree at the incorrect times and
appending to requested_values at the incorrect times.

Fixes #12

1.0.7

Use LRU set in acceptor to track accepted decrees

Issue is that without using an LRU set the memory used to keep track of
accepted decree results would grow indefinitely. This change mantains an LRU
set to prevent indifinite memory usage and continue to track accepted decrees.

1.0.6

Fix missing decrees

Issue is that previously accepted decree from past rounds would later be be
handled as rejected decrees in subsequent rounds. This leads to confusion when
calculating quorum in the rejection handler. This commit fixes this by
maintaining a map of previous accepted decrees of the acceptor.

1.0.5

Fix absentee ballot count with decree contention

Issue is that absentee ballot count should contain a single entry for each root
decree. Decree number is actually meaningless in this context. As such it
should not be used in the hash algorithm. A simple solution is to set decree
number equal to root number.

1.0.4

Add period attempt to flush stuck decrees.

Issue is that it is possible for a decree to become stuck if messages are
dropped at inopportune times. For example, if a proposer sends out a prepare,
but all the messages are lost then the decree can be come stuck. In order to
become unstuck the proposer must re-send the prepare or another decree has to
be accepted from another replica and retrigger a new round of paxos. This
change allows the first scenario to take place so that the replica can unstick
itself.

1.0.3

Update file send to be block call

Fixes #8

1.0.2

Filter prepare response on reject-tie decrees.

This commmit adds additional constraits to logic for resending prepare messages
during decree contention. It limits the prepare message response to trigger a
single time for a given decree, regardless of who sent the message. This
prevents growth of messages sent by preventing multiple messages in response to
a duplicate reject-tie message from separate replicas.

Fixes #6

1.0.1

Flush replicated files during bootstrap

1.0.0

Fix update of highest_proposed_decree during contention