java.lang.NullPointerException on some commands (stats, conf)

[Mike Smotritsky]

Hi, I've installed 3.5.5 and 3.5.6 3-server cluster. Secured and using 
SSLQuorum.
All works well except that I'm getting NullPointerException when invoking 
certain commands through Web AdminServer (stats,conf)
Others works well.
****************************************
java.lang.NullPointerException
        at 
org.apache.zookeeper.server.ZooKeeperServer.getConf(ZooKeeperServer.java:220)
        at 
org.apache.zookeeper.server.admin.Commands$ConfCommand.run(Commands.java:162)
        at 
org.apache.zookeeper.server.admin.Commands.runCommand(Commands.java:95)
        at 
org.apache.zookeeper.server.admin.JettyAdminServer$CommandServlet.doGet(JettyAdminServer.java:175)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at 
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:505)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:786)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:743)
        at java.base/java.lang.Thread.run(Thread.java:834)
java.lang.NullPointerException
        at 
org.apache.zookeeper.server.admin.Commands$StatCommand.run(Commands.java:461)
        at 
org.apache.zookeeper.server.admin.Commands.runCommand(Commands.java:95)
        at 
org.apache.zookeeper.server.admin.JettyAdminServer$CommandServlet.doGet(JettyAdminServer.java:175)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at 
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:505)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:786)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:743)
        at java.base/java.lang.Thread.run(Thread.java:834)


Thanks and Regards,

MIke