Oozie EL函數：嘗試將String轉換爲類型「java.lang.Double」的異常

Question

我試圖運行調用EL函數replaceAll（）的Oozie工作流。這是一個使用的replaceAll（）的作用是這樣的

<action name="createSuccess"> 
    <fs> 
     <configuration> 
      <property> 
       <name>runDate</name> 
       <value>${replaceAll(hdfsDir, nameNode + '/(.+)/' + region + '/([0-9\\-]+)/?', '$2')}</value> 
      </property> 
     </configuration> 
     <mkdir path="${nameNode}/path/run/${region}/${runDate}"/> 
     <touchz path="${nameNode}/path/run/${region}/${runDate}/success.txt"/> 
    </fs> 
    <ok to="end"/> 
    <error to="sendEmailKill"/> 
    </action> 

hdfsDir是一樣的東西HDFS：//的NameNode：8020 /一些/路徑/區域/ 2015年4月22日，我需要抓住該日期的結束作爲財產並使用它。

但是當我運行上面的動作，我得到這個異常：

javax.servlet.jsp.el.ELException: An exception occured trying to convert String "hdfs://nameNode:8020" to type "java.lang.Double" 
     at org.apache.commons.el.Logger.logError(Logger.java:481) 
     at org.apache.commons.el.Logger.logError(Logger.java:498) 
     at org.apache.commons.el.Logger.logError(Logger.java:566) 
     at org.apache.commons.el.Coercions.coerceToPrimitiveNumber(Coercions.java:440) 
     at org.apache.commons.el.Coercions.applyArithmeticOperator(Coercions.java:852) 
     at org.apache.commons.el.ArithmeticOperator.apply(ArithmeticOperator.java:83) 
     at org.apache.commons.el.BinaryOperatorExpression.evaluate(BinaryOperatorExpression.java:170) 
     at org.apache.commons.el.FunctionInvocation.evaluate(FunctionInvocation.java:163) 
     at org.apache.commons.el.ExpressionString.evaluate(ExpressionString.java:114) 
     at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:274) 
     at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:190) 
     at org.apache.oozie.util.ELEvaluator.evaluate(ELEvaluator.java:203) 
     at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:175) 
     at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:60) 
     at org.apache.oozie.command.XCommand.call(XCommand.java:280) 
     at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:326) 
     at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:255) 
     at org.apache.oozie.service.CallableQueueService$CallableWrapper.run(CallableQueueService.java:175) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
     at java.lang.Thread.run(Thread.java:744) 

任何想法，爲什麼我得到這個例外，如何解決呢？

Answer 1

試用一個錯誤後，我發現我不能使用「+」連接兩個字符串。我得用這個：

${replaceAll(hdfsDumpDir, concat(concat(concat(nameNode, '/(.+)/'), region), '/'), '')}