This ensures that only one will run at a time, which should help fix the
clogged up mapreduces we've seen on sandbox.
In order to do this, the UnlockerOutput is introduced. This unlocks the
given Lock after all reducer shards have finished.
Also increases the lease duration of the DNS refresh action from 20 to
240 minutes. 20 minutes isn't long enough; when there's a lot of domains
and decent system load the mapreduce could take longer than that in the
ordinary case.
TESTED=Deployed to alpha and verified that more than one copy of the
mapreduce wouldn't run simultaneously, and also that the lock is
released when the mapreduce is finished.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=205887554
It doesn't entirely make semantic sense, since the actual state of the
SystemClock isn't being preserved, but it makes injection into serializable
classes (e.g. mapreduces) much simpler, so it's worth doing.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201755949
SystemClock isn't Serializable (for obvious reasons), whereas LockHandlerImpl is
used as a field on some Serializable mapreduce classes. So mark it transient and
then re-generate it on first use following de-serialization when it happens to
be null.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201707209
Rather than just logging a generic TimeoutException, this will say what action
timed out and how long it had been executing for.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201049025
This is a 'green' Flogger migration CL. Green CLs are intended to be as
safe as possible and should be easy to review and submit.
No changes should be necessary to the code itself prior to submission,
but small changes to BUILD files may be required.
Changes within files are completely independent of each other, so this CL
can be safely split up for review using tools such as Rosie.
For more information, see []
Base CL: 197826149
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=198560170
This was a surprisingly involved change. Some of the difficulties included
java.util.Optional purposely not being Serializable (so I had to move a
few Optionals in mapreduce classes to @Nullable) and having to add the Truth
Java8 extension library for assertion support.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=171863777
We're going to need to switch away from Guava's Functions and Predicates for
everything and replace them with the java.util versions. Unfortunately there
does not appear to be an automated tool to do this all at once. Refaster got
close but doesn't seem to care about these particular types of mismatch (I
suspect we're using a different version of the JDK than the outside world;
ours is OK with Guava classes).
This also bumps up Guava to 0.23, which is needed for some new functionality
used in combination with Java 8 features.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=170531539
Sometimes requests "die" suddenly, without going through catch/finally blocks.
If this happens, any lock they own will remain locked until it times out (which
can take hours in some cases).
This cl implicitly unlocks any lock if the owner of the lock isn't running
anymore.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=168880938
