17572 14:08:43.485878 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.486132 clock_gettime(CLOCK_REALTIME, {1423721323, 486165000}) = 017572 14:08:43.486204 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9949000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.496964 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.497142 clock_gettime(CLOCK_REALTIME, {1423721323, 497169000}) = 017572 14:08:43.497236 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9935000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.507896 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.508164 clock_gettime(CLOCK_REALTIME, {1423721323, 508201000}) = 017572 14:08:43.508240 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9945000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.518960 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.519140 clock_gettime(CLOCK_REALTIME, {1423721323, 519168000}) = 017572 14:08:43.519236 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9934000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.529882 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.530144 clock_gettime(CLOCK_REALTIME, {1423721323, 530177000}) = 017572 14:08:43.530216 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9946000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.540951 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.541129 clock_gettime(CLOCK_REALTIME, {1423721323, 541157000}) = 017572 14:08:43.541222 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9935000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.551872 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.552127 clock_gettime(CLOCK_REALTIME, {1423721323, 552159000}) = 017572 14:08:43.552199 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9949000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.562857 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.563029 clock_gettime(CLOCK_REALTIME, {1423721323, 563056000}) = 017572 14:08:43.563119 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9936000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.573913 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.574159 clock_gettime(CLOCK_REALTIME, {1423721323, 574214000}) = 017572 14:08:43.574253 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9925000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.584885 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.585055 clock_gettime(CLOCK_REALTIME, {1423721323, 585081000}) = 017572 14:08:43.585147 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9936000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.595900 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.596170 clock_gettime(CLOCK_REALTIME, {1423721323, 596206000}) = 017572 14:08:43.596245 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9947000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.606960 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.607139 clock_gettime(CLOCK_REALTIME, {1423721323, 607167000}) = 017572 14:08:43.607232 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9935000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.617875 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.618119 clock_gettime(CLOCK_REALTIME, {1423721323, 618209000}) = 017572 14:08:43.618249 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9890000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.628960 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.629140 clock_gettime(CLOCK_REALTIME, {1423721323, 629168000}) = 017572 14:08:43.629231 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9935000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.639865 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.640134 clock_gettime(CLOCK_REALTIME, {1423721323, 640167000}) = 017572 14:08:43.640206 futex(0x580497a4, FUTEX_WAIT_PRIVATE, 1, {0, 9946000}) = -1 ETIMEDOUT (Connection timed out)17572 14:08:43.650868 futex(0x58049028, FUTEX_WAKE_PRIVATE, 1) = 017572 14:08:43.651139 unlink("/tmp/hsperfdata_gamedata/17559") = 017572 14:08:43.651324 exit_group(0)= ?
怎么那么多futex，google一查“futex connection time out”，嘿，还真有很多结果，最典型的就是leap second,中文翻译为“闰秒”，但仔细一看，上一次闰秒发生是2012年06月份，现在都2015年了，而且天天cpu都高，应该不是这个问题
工具指望不上，，只好看代码，代码看了后怀疑几个地方：
1）CountDownLatch：因为这个最有可能用到futex了，但实际想了想和验证了一下，这个东东不可能导致cpu这么高，真有这个问题，这东东完全就没法用了
2）多线程：看了代码，没有几个线程，而且业务就是一发一收，不可能多线程导致的
问题陷入僵局，怎么办呢？ 只好用终极大招了：分段注释！
1）注释响应处理的代码 —— 不行，cpu占用100%
2）注释发送请求的代码 —— 还是不行，，cpu占用100%
这不坑爹嘛，请求都不发，响应也没有了，你咋还这么慢？
3）干脆注释所有代码， 只在main里面打印Hello world —— 还是不行，，cpu占用100%
这下就蛋疼了，没有任何业务，你cpu还高，这不坑我嘛
4）自己写个Hello world —— 咦，这次可以了，cpu占用1%左右
咋回事，同样都是打印Hello world，为啥cpu差别那么大？
左思右想，突然灵光一闪：难道是和jvm加载类文件有关 ？
你曾经说，等我们老的时候，
