In logjson, fix bugs to respect cache pinning and improve synchronization

diff --git a/logjson b/logjson
index 9a33af1..e4630e0 160000 (submodule)
--- a/logjson
+++ b/logjson
@@ -1 +1 @@
-Subproject commit 9a33af10f31cef862daa51c0190a4e32e8059bb3
+Subproject commit e4630e08a36567abc781f6455fadb06dc63a6350