[jira] [Created] (PIO-59) "pio app new" sometimes takes long time

["Shinsuke Sugaya (JIRA)" <ji...@apache.org>]

Shinsuke Sugaya created PIO-59:
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             Summary: "pio app new" sometimes takes long time
                 Key: PIO-59
                 URL: https://issues.apache.org/jira/browse/PIO-59
             Project: PredictionIO
          Issue Type: Improvement
            Reporter: Shinsuke Sugaya
            Priority: Minor


Some users reported this problem in user ML, and I also encountered it.
Checking stack traces, I think the cause is an entropy shortage for /dev/random.

{code}
"main" #1 prio=5 os_prio=0 tid=0x00007fc94803f800 nid=0x49a9 runnable [0x00007fc94fa1b000]
   java.lang.Thread.State: RUNNABLE
        at java.io.FileInputStream.readBytes(Native Method)
        at java.io.FileInputStream.read(FileInputStream.java:255)
        at sun.security.provider.NativePRNG$RandomIO.readFully(NativePRNG.java:424)
        at sun.security.provider.NativePRNG$RandomIO.ensureBufferValid(NativePRNG.java:525)
        at sun.security.provider.NativePRNG$RandomIO.implNextBytes(NativePRNG.java:544)
        - locked <0x00000003d34e8a48> (a java.lang.Object)
        at sun.security.provider.NativePRNG$RandomIO.access$400(NativePRNG.java:331)
        at sun.security.provider.NativePRNG$Blocking.engineNextBytes(NativePRNG.java:268)
        at java.security.SecureRandom.nextBytes(SecureRandom.java:468)
        at org.apache.predictionio.data.storage.AccessKeys$class.generateKey(AccessKeys.scala:71)
        at org.apache.predictionio.data.storage.elasticsearch.ESAccessKeys.generateKey(ESAccessKeys.scala:40)
        at org.apache.predictionio.data.storage.elasticsearch.ESAccessKeys.insert(ESAccessKeys.scala:60)
        at org.apache.predictionio.tools.commands.App$$anonfun$create$4$$anonfun$apply$5.apply(App.scala:71)
        at org.apache.predictionio.tools.commands.App$$anonfun$create$4$$anonfun$apply$5.apply(App.scala:62)
        at scala.Option.map(Option.scala:145)
        at org.apache.predictionio.tools.commands.App$$anonfun$create$4.apply(App.scala:62)
        at org.apache.predictionio.tools.commands.App$$anonfun$create$4.apply(App.scala:55)
        at scala.Option.getOrElse(Option.scala:120)
        at org.apache.predictionio.tools.commands.App$.create(App.scala:55)
        at org.apache.predictionio.tools.console.Pio$App$.create(Pio.scala:172)
        at org.apache.predictionio.tools.console.Console$$anonfun$main$1.apply(Console.scala:683)
        at org.apache.predictionio.tools.console.Console$$anonfun$main$1.apply(Console.scala:626)
        at scala.Option.map(Option.scala:145)
        at org.apache.predictionio.tools.console.Console$.main(Console.scala:626)
        at org.apache.predictionio.tools.console.Console.main(Console.scala)
{code}





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