We have released v4.2.0. ChangeLog is here.
This release is a maintenance release of v4.x series.
We recommend to upgrade TD Agent because it contains latest Fluentd v1.13.3.
Jemalloc was downgraded to v3.6.0
Because of excessive amounts of memory consuming issue, bundled version of jemalloc was downgraded from v5.2.1 to v3.6.0.
This issue seems a well known issue as follows:
Jemalloc v3.6.0 is stable enough (according to jemlloc's web site, it still seems be supported)
See https://github.com/fluent-plugins-nursery/td-agent-builder/issues/305 about details.
Dependency to perl package was removed
In the previous versions,
td-agent has dependency to perl packages.
This is because it bundles
jeprof, but users do not want to install extra dependencies.
So, we decided to drop it.