BUCK 构建失败汇总

1. inotify 数到顶

[2015-12-11 18:36:39.195][error][command:f648a06d-621e-465f-9793-2c2ed5c60cfd][tid:13][com.facebook.buck.util.WatchmanWatcher] Error in Watchman output. Posting an overflow event to flush the caches
com.facebook.buck.util.WatchmanWatcherException: A non-recoverable condition has triggered.  Watchman needs your help!
The triggering condition was at timestamp=1449830117: inotify-add-watch(/media/Data/GameSDK/Code/git/sdk-onlinegame/Plugin_Account/bin/classes/cn/uc/gamesdk/account/model) -> The user limit on the total number of inotify watches was reached; increase the fs.inotify.max_user_watches sysctl
All requests will continue to fail with this message until you resolve
the underlying problem.  You will find more information on fixing this at
https://facebook.github.io/watchman/docs/troubleshooting.html#poison-inotify-add-watch

	at com.facebook.buck.util.WatchmanWatcher.postEvents(WatchmanWatcher.java:317)
	at com.facebook.buck.cli.Main$Daemon.watchFileSystem(Main.java:338)
	at com.facebook.buck.cli.Main$Daemon.access$6(Main.java:327)
	at com.facebook.buck.cli.Main.getParserFromDaemon(Main.java:860)
	at com.facebook.buck.cli.Main.runMainWithExitCode(Main.java:666)
	at com.facebook.buck.cli.Main.tryRunMainWithExitCode(Main.java:1076)
	at com.facebook.buck.cli.Main.runMainThenExit(Main.java:1133)
	at com.facebook.buck.cli.Main.nailMain(Main.java:1162)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.martiansoftware.nailgun.NGSession.run(NGSession.java:338)

打开它推荐的页https://facebook.github.io/watchman/docs/troubleshooting.html#poison-inotify-add-watch,它说的原因可能有两个

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1. The user limit on the total number of inotify watches was reached or the kernel failed to allocate a needed resource
2. Insufficient kernel memory was available

buck 的watchman背后的应该就是使用inotify来监控,出现这个问题应该跟buck与watchman本身无关,再查看另一个facebook的文档https://facebook.github.io/watchman/docs/install.html#system-specific-preparation里面,提到linux里的三个配置项

• /proc/sys/fs/inotify/max_user_instances impacts how many different root dirs you can watch.
• /proc/sys/fs/inotify/max_user_watches impacts how many dirs you can watch across all watched roots.
• /proc/sys/fs/inotify/max_queued_events impacts how likely it is that your system will experience a notification overflow.

按我当前的错误提示来看应该是max_user_watches数到顶了,/proc/sys/fs/inotify/max_user_watches默认是8192,直接echo一个更大的数进去就可以了.