diff --git a/core/combo/javac.mk b/core/combo/javac.mk
index dac2628..32a5c9e 100644
--- a/core/combo/javac.mk
+++ b/core/combo/javac.mk
@@ -16,4 +16,5 @@
 
 # TODO(ccross): remove this, it is needed for now because it is used by
 # config.mk before makevars from soong are loaded
-JAVA := $(ANDROID_JAVA_TOOLCHAIN)/java
+JAVA := $(ANDROID_JAVA_TOOLCHAIN)/java -XX:OnError="cat hs_err_pid%p.log" -XX:CICompilerCount=6 -XX:+UseDynamicNumberOfGCThreads
+