This is a bug. Would you mind filing a JIRA? Also feel free to upload a patch.
On Sat, Dec 27, 2014 at 7:25 PM, Bae, Jae Hyeon <metac...@gmail.com> wrote: > Hi > > While I am testing kafka java producer, I saw the following NPE > > SLF4J: Failed toString() invocation on an object of type > [org.apache.kafka.common.Cluster] > java.lang.NullPointerException > at org.apache.kafka.common.PartitionInfo.toString(PartitionInfo.java:72) > at java.lang.String.valueOf(String.java:2854) > at java.lang.StringBuilder.append(StringBuilder.java:128) > at java.util.AbstractCollection.toString(AbstractCollection.java:458) > at java.lang.String.valueOf(String.java:2854) > at java.lang.StringBuilder.append(StringBuilder.java:128) > at org.apache.kafka.common.Cluster.toString(Cluster.java:151) > at > > org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:305) > at > > org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:277) > at > org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:231) > at org.slf4j.helpers.MessageFormatter.format(MessageFormatter.java:152) > at org.slf4j.impl.Log4jLoggerAdapter.debug(Log4jLoggerAdapter.java:251) > at > > org.apache.kafka.clients.producer.internals.Metadata.update(Metadata.java:133) > at > > org.apache.kafka.clients.NetworkClient.handleMetadataResponse(NetworkClient.java:299) > at > > org.apache.kafka.clients.NetworkClient.handleCompletedReceives(NetworkClient.java:284) > at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:185) > at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:175) > at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:115) > at java.lang.Thread.run(Thread.java:744) > > This looks like not critical because it's debug() statement but this NPE > means potential threat in kafka producer stableness. > > Do you have any idea? If you want, I can share my test code. > > Thank you > Best, Jae >
