Jackson module that adds support for serializing and deserializing Google's Protocol Buffers to and from JSON. By HubSpot.

"""
ThreeTen-Extra provides additional date-time classes that complement those in Java SE 8. ... The following features are included:

* DayOfMonth - a day-of-month without month or year
* DayOfYear - a day-of-year without year
* AmPm - before or after midday
* Quarter - the four quarters, Q1, Q2, Q3 and Q4
* YearQuarter - combines a year and quarter, 2014-Q4
* YearWeek - combines a week-based-year and a week, 2014-W06
* Days, Weeks, Months and Years - amounts of time
* Interval - an interval between two instants
* PeriodDuration - combines Period and Duration
* Weekend adjusters
* Coptic calendar system
* Ethiopic calendar system
* Julian calendar system
* Word-based period and duration formatting
* Support for the TAI and UTC time-scales
"""

Addressing container limitations with Java 9 and 10
Multiple JVM instances are unavoidable, but still lightweight
Having to spawn a complete JVM per container is still inevitable. However, take a look at a modern version of Java that’s running on a container with a simple application on top…

docker run -d --name simple_stats mateobur/javatroubleshooting3
…and you’ll notice it takes about a second to launch and the memory usage is around ~40MB:

A low overhead sampling profiler for Java that does not suffer from Safepoint bias problem. It features HotSpot-specific APIs to collect stack traces and to track memory allocations. The profiler works with OpenJDK, Oracle JDK and other Java runtimes based on HotSpot JVM.
Featuring AsyncGetCallTrace + perf_events.

Simple example of creating a shaded jar with the maven shade plugin