Kafka not working after consumer has started to consume data - apache-kafka

Question

I am new to Kafka and installed kafka in windows 10 using Steps in https://kafka.apache.org/quickstart
In step 5 after starting consumer.
I am getting following errors after running following command
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning
I am getting following error when I create topic with above command.
[2019-03-18 19:09:44,905] ERROR Error while loading log dir C:\tmp\kafka-logs (kafka.log.LogManager)
java.io.IOException: Map failed
at sun.nio.ch.FileChannelImpl.map(Unknown Source)
at kafka.log.AbstractIndex.<init>(AbstractIndex.scala:126)
at kafka.log.OffsetIndex.<init>(OffsetIndex.scala:54)
at kafka.log.LogSegment$.open(LogSegment.scala:634)
at kafka.log.Log$$anonfun$kafka$log$Log$$loadSegmentFiles$3.apply(Log.scala:434)
at kafka.log.Log$$anonfun$kafka$log$Log$$loadSegmentFiles$3.apply(Log.scala:421)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
After this error, even if I start Kafka server same error is coming.
Another error is when I list topics or create topic:
bin/kafka-topics.sh --list --zookeeper localhost:2181
log4j:ERROR Could not read configuration file from URL [file:/c/Users/sboyapal/Projects/Polaris/kafka_2.11-2.1.0/bin/../config/tools-log4j.properties].
java.io.FileNotFoundException: \c\Users\sboyapal\Projects\Polaris\kafka_2.11-2.1.0\bin\..\config\tools-log4j.properties (The system cannot find the path specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:557)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
at org.slf4j.impl.Log4jLoggerFactory.<init>(Log4jLoggerFactory.java:66)
at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:72)
at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:45)
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
at com.typesafe.scalalogging.Logger$.apply(Logger.scala:48)
at kafka.utils.Log4jControllerRegistration$.<init>(Logging.scala:25)
at kafka.utils.Log4jControllerRegistration$.<clinit>(Logging.scala)
at kafka.utils.Logging$class.$init$(Logging.scala:47)
at kafka.admin.TopicCommand$.<init>(TopicCommand.scala:40)
at kafka.admin.TopicCommand$.<clinit>(TopicCommand.scala)
at kafka.admin.TopicCommand.main(TopicCommand.scala)
log4j:ERROR Ignoring configuration file [file:/c/Users/sboyapal/Projects/Polaris/kafka_2.11-2.1.0/bin/../config/tools-log4j.properties].
log4j:WARN No appenders could be found for logger (kafka.utils.Log4jControllerRegistration$).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
test

Answer 1

The only way to fix the issue is to just delete the C:\tmp\kafka-logs directory. After that start up the kafka server and follow the same steps.