Kislay Verma created CURATOR-453:
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Summary: NPE in ServiceCacheImpl.start() because child.getData()
returns null
Key: CURATOR-453
URL: https://issues.apache.org/jira/browse/CURATOR-453
Project: Apache Curator
Issue Type: Bug
Components: General
Affects Versions: 4.0.0
Reporter: Kislay Verma
This problem is in curator-discovery module where we get an NPE on
ServiceProvider.start() because child.getData() can be null while starting
ServiceCacheImpl. This is similar to
https://issues.apache.org/jira/browse/CURATOR-452 but happens on adding null to
map.
*NPE Stacktrace*
{{java.lang.NullPointerException at
java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
~[?:1.8.0_112] at
java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:1535)
~[?:1.8.0_112] at
org.apache.curator.x.discovery.details.ServiceCacheImpl.addInstance(ServiceCacheImpl.java:196)
~[curator-x-discovery-4.0.0.jar:?] at
org.apache.curator.x.discovery.details.ServiceCacheImpl.start(ServiceCacheImpl.java:96)
~[curator-x-discovery-4.0.0.jar:?] at
org.apache.curator.x.discovery.details.ServiceProviderImpl.start(ServiceProviderImpl.java:75)
~[curator-x-discovery-4.0.0.jar:?]}}
*The code*
{{client = CuratorFrameworkFactory.newClient("localhost:2181", new
ExponentialBackoffRetry(1000, 3));}}
{{client.start();}}
{{serviceDiscovery =
ServiceDiscoveryBuilder.builder(ServiceRecord.class).client(client).basePath("/discovery/services/").serializer(serializer).build();
serviceDiscovery.start();}}
{{serviceProvider =
serviceDiscovery.serviceProviderBuilder().serviceName(serviceName).build();}}
{{serviceProvider.start();}}
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