[ATLAS-2437] When using org.apache.atlas:falcon-bridge:0.8.2, conflicting classes are introduced from two different JARs: <org.apache.zookeeper:zookeeper:3.4.6:><org.apache.atlas:atlas-graphdb-titan0:0.8.2:>, which caused NoSuchMethodError

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.8.2
• Component/s: atlas-core
• Assignee: Unassigned
• Reporter: PandaMonkey
• Created: 12/Feb/18 07:08
• Updated: 27/Jun/19 13:51

Description

When our project using org.apache.atlas:falcon-bridge:0.8.2, conflicting classes are introduced from two different JARs: <org.apache.zookeeper:zookeeper:3.4.6:><org.apache.atlas:atlas-graphdb-titan0:0.8.2:>, which leaded to our project throw NoSuchMethodException. Conflicting classes mean that the classes with same name but have different implementations. Then the JVM only load the classes present first on the classpath and shadow the other duplicate ones. This is the main reason why our program crashed. By analyzing the source code, the we found the conflicting details as follows. To avoid the downstream projects encounter the same problem, please notice this issue.

1. Risk for jar-pair:<javax.xml.stream:stax-api:1.0-2:><stax:stax-api:1.0.1:>
Methods that only exist in javax.xml.stream:stax-api:1.0-2:: [neu.lab:findbug:0.0.1-SNAPSHOT:->org.apache.atlas:falcon-bridge:0.8.2:->org.apache.atlas:hive-bridge:0.8.2:->org.apache.hadoop:hadoop-client:2.7.1:->org.apache.hadoop:hadoop-mapreduce-client-core:2.7.1:->org.apache.hadoop:hadoop-yarn-common:2.7.1:->javax.xml.bind:jaxb-api:2.2.2:->javax.xml.stream:stax-api:1.0-2:]
<javax.xml.stream.XMLOutputFactory: javax.xml.stream.XMLInputFactory newInstance(java.lang.String,java.lang.ClassLoader)>
methods that only exist in stax:stax-api:1.0.1:: [neu.lab:findbug:0.0.1-SNAPSHOT:->org.apache.atlas:falcon-bridge:0.8.2:->org.apache.atlas:atlas-typesystem:0.8.2:->org.codehaus.jettison:jettison:1.3.7:->stax:stax-api:1.0.1:]
<javax.xml.stream.FactoryFinder: java.lang.Class class$(java.lang.String)>
<javax.xml.stream.XMLOutputFactory: javax.xml.stream.XMLOutputFactory newInstance(java.lang.String,java.lang.ClassLoader)>

2. Risk for jar-pair:<stax:stax-api:1.0.1:><xml-apis:xml-apis:1.3.04:>
Methods that only exist in xml-apis:xml-apis:1.3.04:: [neu.lab:findbug:0.0.1-SNAPSHOT:->org.apache.atlas:falcon-bridge:0.8.2:->org.apache.atlas:hive-bridge:0.8.2:->org.apache.hadoop:hadoop-client:2.7.1:->org.apache.hadoop:hadoop-hdfs:2.7.1:->xerces:xercesImpl:2.9.1:->xml-apis:xml-apis:1.3.04:]
<javax.xml.namespace.QName: void readObject(java.io.ObjectInputStream)>
<javax.xml.namespace.QName: void <clinit>()>