Error in TraceCPUTime in gc log

[Vladimir Sitnikov]

Hello,

I've installed java 1.7.0_51 to my Synology NAS (ds413j) and it turns out
gc log shows Error in TraceCPUTime.

Can you please clarify why Error in TraceCPUTime happens and what is the
way to eliminate it?
The error appear from time to time, and typically gc log prints meaningful
times (user, sys, real)

Relevant startup arguments are: -Xms20m -Xmx384m -Xloggc:/.../gc.log
-XX:+PrintGCDetails -XX:+PrintGCDateStamps

Here's extract from gc log:

2014-03-05T09:03:31.739+0000: 67.290: [GC2014-03-05T09:03:31.740+0000:
67.290: [DefNew: 5760K->639K(6400K), 0.0391810 secs] 12413K->8398K(20096K),
0.0395380 secs] [Times: user=0.04 sys=0.00, real=0.04 secs]
2014-03-05T09:03:33.971+0000: 69.521: [GC2014-03-05T09:03:33.971+0000:
69.521: [DefNew: 6399K->639K(6400K), 0.0483430 secs]
14158K->10024K(20096K), 0.0486930 secs][Error in TraceCPUTime]
2014-03-05T09:03:36.220+0000: 71.770: [GC2014-03-05T09:03:36.220+0000:
71.770: [DefNew: 6399K->639K(6400K), 0.0434850 secs]
15784K->11383K(20096K), 0.0438150 secs][Error in TraceCPUTime]
2014-03-05T09:03:38.709+0000: 74.259: [GC2014-03-05T09:03:38.709+0000:
74.259: [DefNew: 6399K->639K(6400K), 0.0485340 secs]
17143K->12902K(20096K), 0.0488690 secs][Error in TraceCPUTime]
2014-03-05T09:03:41.089+0000: 76.639: [GC2014-03-05T09:03:41.089+0000:
76.640: [DefNew: 4619K->475K(6400K), 0.0295340 secs]
16882K->13280K(20096K), 0.0298930 secs][Error in TraceCPUTime]
2014-03-05T09:03:41.147+0000: 76.698: [GC2014-03-05T09:03:41.147+0000:
76.698: [DefNew: 4871K->8K(6400K), 0.0260880
secs]2014-03-05T09:03:41.173+0000: 76.724: [Tenured: 17299K->9531K(18056K),
0.3326210 secs] 17676K->9531K(24456K), [Perm : 15271K->15271K(15360K)],
0.3594560 secs][Error in TraceCPUTime]
2014-03-05T09:03:42.129+0000: 77.679: [GC2014-03-05T09:03:42.129+0000:
77.679: [DefNew: 6653K->677K(7424K), 0.0307960 secs]
16184K->12512K(23312K), 0.0311450 secs][Error in TraceCPUTime]
2014-03-05T09:03:42.725+0000: 78.276: [GC2014-03-05T09:03:42.725+0000:
78.276: [DefNew: 5128K->768K(7424K), 0.0334390 secs]
16963K->15077K(23312K), 0.0337950 secs][Error in TraceCPUTime]
2014-03-05T09:03:43.519+0000: 79.069: [GC2014-03-05T09:03:43.519+0000:
79.069: [DefNew: 7424K->590K(7424K), 0.0361830
secs]2014-03-05T09:03:43.555+0000: 79.106: [Tenured:
18740K->19055K(19712K), 0.3247280 secs] 21733K->19055K(27136K), [Perm :
15581K->15581K(15616K)], 0.3616160 secs][Error in TraceCPUTime]

Here are the versions being used:

DiskStation> uname -a

Linux DiskStation 2.6.32.12 #3827 Tue Feb 11 19:48:33 CST 2014 armv5tel
GNU/Linux
DiskStation> java -version
java version "1.7.0_51"
Java(TM) SE Embedded Runtime Environment (build 1.7.0_51-b13, headless)
Java HotSpot(TM) Embedded Client VM (build 24.51-b03, mixed mode)

-- 
Regards,
Vladimir Sitnikov
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