为什么 Java 8 GC 日志中包括新生代 "Allocation Failure" 信息？

Issue

• 为什么 Java 8 GC 日志中包括新生代 "Allocation Failure" 信息？

2015-06-16T13:23:09.424-0400: 1872.996: [GC (Allocation Failure) [PSYoungGen: 561821K->20572K(613376K)] 659843K->118602K(2011648K), 0.0329076 secs] [Times: user=0.04 sys=0.00, real=0.04 secs] 
2015-06-16T13:31:12.042-0400: 2355.614: [GC (Allocation Failure) [PSYoungGen: 551004K->25542K(619008K)] 649034K->123580K(2017280K), 0.0774830 secs] [Times: user=0.15 sys=0.00, real=0.07 secs] 
2015-06-16T13:44:20.370-0400: 3143.942: [GC (Allocation Failure) [PSYoungGen: 562630K->22931K(616960K)] 660668K->120977K(2015232K), 0.0326503 secs] [Times: user=0.06 sys=0.00, real=0.03 secs] 
2015-06-16T13:58:51.005-0400: 4014.577: [GC (Allocation Failure) [PSYoungGen: 560019K->24357K(623616K)] 658065K->122411K(2021888K), 0.0500686 secs] [Times: user=0.07 sys=0.00, real=0.05 secs]