Aggressively test Oracle

[keith-turner]

The proper functioning of the Oracle is critical. Need an Oracle test suite that pauses and kills Oracle processes while allocating and verifying timestamps. Some of the situations the test suite should induce are :

• Client connected to an oracle process thats no longer the leader
• Client connected to an oracle process thats paused
• Client connected to an oracle process thats dead

[cjnolet]

It would be useful to try and reproduce these too:

• Oracle loses its connection to zookeeper for a brief period and reconnects (leader selector should requeue).
• Client loses its connection to Zookeeper while leader changed
• All oracles go down. (Client should immediately connect when the first oracle comes back up).

[cjnolet]

Pull request #40 should help a tad with some of these cases as the OracleClient will listen for events from Zookeeper for changes to the children of the ZNode being used to compete for leadership and pro-actively adjust its connection to the oracle server.

[cjnolet]

Client connected to an oracle process thats paused

What exactly do you mean by paused?

[keith-turner]

A process thats temporarily unresponsive because its swapped out Java GC
has stopped all threads.

On Mon, Jun 23, 2014 at 10:56 PM, Corey J. Nolet notifications@github.com
wrote:

Client connected to an oracle process thats paused

What exactly do you mean by paused?

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[cjnolet]

Oh wow. Ok yeah that's an aggressive test suite.