[BOOKKEEPER-805] NullPointException in bookie server when using twitter-ostrich-provider

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.3.0
• Fix Version/s: 4.4.0, 4.3.1
• Assignee: Youngjoon Kim
• Reporter: Youngjoon Kim
• Created: 25/Nov/14 11:37
• Updated: 16/May/16 21:47
• Resolved: 06/Dec/14 05:55

Description

How to reproduce this bug
1) Set configurations in conf/bk_server.conf to use twitter-ostrich-provider.

statsProviderClass=org.apache.bookkeeper.stats.twitter.ostrich.OstrichProvider
statsExport=true

2) Copy twitter-ostrich-provider-4.3.0.jar and required library jars to lib directory.

(library jars)
ostrich_2.9.2-9.1.3.jar
scala-json_2.9.2-3.0.1.jar
scala-library-2.9.2.jar
util-app_2.9.2-6.3.7.jar
util-core_2.9.2-6.3.7.jar
util-eval_2.9.2-6.3.7.jar
util-jvm_2.9.2-6.3.7.jar
util-logging_2.9.2-6.3.7.jar

3) Start a bookie server. Then, the server doesn't start and server log shows NullPointException.

2014-11-25 17:30:27,796 - ERROR [main:BookieServer@396] - Exception running bookie server :
java.lang.NullPointerException
    at com.twitter.ostrich.stats.StatsListener.<init>(StatsListener.scala:90)
    at com.twitter.ostrich.stats.LatchedStatsListener.<init>(StatsListener.scala:144)
    at com.twitter.ostrich.stats.StatsListener$$anonfun$apply$4.apply(StatsListener.scala:68)
    at com.twitter.ostrich.stats.StatsListener$$anonfun$apply$4.apply(StatsListener.scala:68)
    at com.twitter.ostrich.stats.StatsListener$$anonfun$getOrRegister$1.apply(StatsListener.scala:40)
    at com.twitter.ostrich.stats.StatsListener$$anonfun$getOrRegister$1.apply(StatsListener.scala:39)
    at scala.Option.getOrElse(Option.scala:108)
    at com.twitter.ostrich.stats.StatsListener$.getOrRegister(StatsListener.scala:39)
    at com.twitter.ostrich.stats.StatsListener$.apply(StatsListener.scala:67)
    at com.twitter.ostrich.admin.AdminServiceFactory$$anonfun$configureStatsListeners$1.apply(AdminServiceFactory.scala:81)
    at com.twitter.ostrich.admin.AdminServiceFactory$$anonfun$configureStatsListeners$1.apply(AdminServiceFactory.scala:81)
    at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
    at scala.collection.immutable.List.foreach(List.scala:76)
    at com.twitter.ostrich.admin.AdminServiceFactory.configureStatsListeners(AdminServiceFactory.scala:81)
    at com.twitter.ostrich.admin.AdminServiceFactory.apply(AdminServiceFactory.scala:61)
    at org.apache.bookkeeper.stats.twitter.ostrich.OstrichProvider.start(OstrichProvider.java:57)
    at org.apache.bookkeeper.proto.BookieServer.main(BookieServer.java:375)