java.lang.NullPointerException: null

Stack Overflow | james800 | 1 month ago
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  1. 0

    File appender throws java.lang.NullPointerException

    Stack Overflow | 1 month ago | james800
    java.lang.NullPointerException: null
  2. 0

    JZeppelinDataAnalytics - Cannot push data to cassandra

    Google Groups | 9 months ago | Thuc Vu
    java.lang.NullPointerException: null >> at >> org.kaaproject.kaa.server.appenders.cassandra.appender.CassandraLogAppender.doAppend(CassandraLogAppender.java:96) >> ~[cassandra-appender-0.9.0.jar:na] >> at >> org.kaaproject.kaa.server.common.log.shared.appender.AbstractLogAppender.doAppend(AbstractLogAppender.java:166) >> ~[log-shared-0.9.0.jar:na] >> at >> org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActorMessageProcessor.lambda$processLogEventPack$1(ApplicationLogActorMessageProcessor.java:113) >> ~[kaa-node-0.9.0.jar:na] >> at java.util.ArrayList.forEach(ArrayList.java:1249) ~[na:1.8.0_66] >> at >> org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActorMessageProcessor.processLogEventPack(ApplicationLogActorMessageProcessor.java:111) >> ~[kaa-node-0.9.0.jar:na] >> at >> org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActor.onReceive(ApplicationLogActor.java:97) >> ~[kaa-node-0.9.0.jar:na] >> at >> akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)
  3. 0

    The Issues that are caused by Kaa cluster

    Stack Overflow | 4 months ago | Huawei Xie
    java.security.InvalidParameterException: Cache key can't be null
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    Root Cause Analysis

    1. java.lang.NullPointerException

      null

      at org.kaaproject.kaa.server.appenders.file.appender.LogbackFileSystemLogger.append()
    2. org.kaaproject.kaa
      ApplicationLogActorMessageProcessor.lambda$processLogEventPack$0
      1. org.kaaproject.kaa.server.appenders.file.appender.LogbackFileSystemLogger.append(LogbackFileSystemLogger.java:92)[file-appender-0.10.0.jar:na]
      2. org.kaaproject.kaa.server.appenders.file.appender.FileSystemLogAppender.doAppend(FileSystemLogAppender.java:63)[file-appender-0.10.0.jar:na]
      3. org.kaaproject.kaa.server.common.log.shared.appender.AbstractLogAppender.doAppend(AbstractLogAppender.java:74)[log-shared-0.10.0.jar:na]
      4. org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActorMessageProcessor.lambda$processLogEventPack$0(ApplicationLogActorMessageProcessor.java:111)[kaa-node-0.10.0.jar:na]
      4 frames
    3. Java RT
      ArrayList.forEach
      1. java.util.ArrayList.forEach(ArrayList.java:1249)[na:1.8.0_121]
      1 frame
    4. org.kaaproject.kaa
      ApplicationLogActor.onReceive
      1. org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActorMessageProcessor.processLogEventPack(ApplicationLogActorMessageProcessor.java:111)[kaa-node-0.10.0.jar:na]
      2. org.kaaproject.kaa.server.operations.service.akka.actors.core.ApplicationLogActor.onReceive(ApplicationLogActor.java:59)[kaa-node-0.10.0.jar:na]
      2 frames