【解决】hbase regionserver意外关机启动失败 [main] mortbay.log: tmpdir java.io.IOException: Permission denied

错误信息：

015-12-24 10:57:26,527 INFO  [main] mortbay.log: jetty-6.1.26.cloudera.4

2015-12-24 10:57:26,553 WARN  [main] mortbay.log: tmpdir

java.io.IOException: Permission denied

at java.io.UnixFileSystem.createFileExclusively(Native Method)

at java.io.File.createTempFile(File.java:2001)

at java.io.File.createTempFile(File.java:2047)

at org.mortbay.jetty.webapp.WebAppContext.getTempDirectory(WebAppContext.java:784)

at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:491)

at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)

at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)

at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)

at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)

at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)

at org.mortbay.jetty.Server.doStart(Server.java:224)

at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)

at org.apache.hadoop.hbase.http.HttpServer.start(HttpServer.java:956)

at org.apache.hadoop.hbase.http.InfoServer.start(InfoServer.java:91)

at org.apache.hadoop.hbase.regionserver.HRegionServer.putUpWebUI(HRegionServer.java:1719)

at org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:566)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

at org.apache.hadoop.hbase.regionserver.HRegionServer.constructRegionServer(HRegionServer.java:2515)

at org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.start(HRegionServerCommandLine.java:64)

at org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.run(HRegionServerCommandLine.java:87)

at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)

at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)

at org.apache.hadoop.hbase.regionserver.HRegionServer.main(HRegionServer.java:2532)

原因：

hbase-regionserver启动时默认会在/tmp/目录下锁文件和进程文件，jetty的临时文件。意外关闭没有清理临时文件导致无法启动。

清理hbase相关的目录,如下图 

来自为知笔记(Wiz)