我尝试通过 Java 将 Titan 与 HBase 结合使用，并收到此错误:
Exception in thread "main" java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.thinkaurelius.titan.diskstorage.Backend.instantiate(Backend.java:342)
at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:367)
at com.thinkaurelius.titan.diskstorage.Backend.getStorageManager(Backend.java:311)
at com.thinkaurelius.titan.diskstorage.Backend.<init>(Backend.java:121)
at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.getBackend(GraphDatabaseConfiguration.java:1173)
at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.<init>(StandardTitanGraph.java:75)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:40)
at ...
我对 IncompleteClassChangeError: Implementing class 的理解是，当类路径中存在冲突的 JAR 时，就会发生这种情况。但是，在这种情况下，我无法分辨这些 JAR 是哪些。以下是完整列表:
activation-1.1.jar
airline-0.6.jar
akka-actor_2.10-2.3.11.jar
akka-remote_2.10-2.3.11.jar
akka-slf4j_2.10-2.3.11.jar
ant-1.9.4.jar
ant-antlr-1.9.4.jar
ant-junit-1.9.4.jar
ant-launcher-1.9.4.jar
antisamy-1.4.3.jar
antlr-2.7.7.jar
antlr-3.2.jar
antlr-runtime-3.2.jar
antlr-runtime-3.5.2.jar
aopalliance-1.0.jar
apache-cassandra-2.2.9.jar
apache-cassandra-clientutil-2.2.9.jar
apache-cassandra-thrift-2.2.9.jar
apacheds-i18n-2.0.0-M15.jar
apacheds-kerberos-codec-2.0.0-M15.jar
api-asn1-api-1.0.0-M20.jar
api-util-1.0.0-M20.jar
asm-3.1.jar
asm-3.2.jar
asm-4.1.jar
asm-commons-4.1.jar
astyanax-cassandra-3.8.0.jar
astyanax-core-3.8.0.jar
astyanax-recipes-3.8.0.jar
astyanax-thrift-3.8.0.jar
avro-1.7.4.jar
avro-1.7.7-IBM-27.jar
avro-ipc-1.7.7-tests.jar
avro-ipc-1.7.7.jar
avro-mapred-1.7.7-hadoop2.jar
batik-css-1.7.jar
batik-ext-1.7.jar
batik-util-1.7.jar
bsf-2.4.0.jar
bsh-core-2.0b4.jar
cassandra-all-2.2.3.jar
cassandra-driver-core-2.2.0-rc2-SNAPSHOT-20150617-shaded.jar
cassandra-thrift-2.2.3.jar
chill_2.10-0.5.0.jar
chill-java-0.5.0.jar
commons-beanutils-1.8.0.jar
commons-beanutils-core-1.7.0.jar
commons-cli-1.1.jar
commons-cli-1.2.jar
commons-codec-1.2.jar
commons-codec-1.4.jar
commons-codec-1.7.jar
commons-codec-1.9.jar
commons-collections-3.2.1.jar
commons-collections-3.2.2.jar
commons-compress-1.4.1.jar
commons-configuration-1.10.jar
commons-configuration-1.6.jar
commons-daemon-1.0.13.jar
commons-digester-1.8.jar
commons-el-1.0.jar
commons-fileupload-1.2.jar
commons-httpclient-3.1.jar
commons-io-2.3.jar
commons-io-2.4.jar
commons-lang-2.5.jar
commons-lang-2.6.jar
commons-lang3-3.1.jar
commons-lang3-3.3.1.jar
commons-logging-1.1.1.jar
commons-logging-1.1.3.jar
commons-logging-1.2.jar
commons-math-2.2.jar
commons-math3-3.1.1.jar
commons-math3-3.2.jar
commons-net-1.4.1.jar
commons-net-3.1.jar
commons-pool-1.6.jar
compress-lzf-0.8.4.jar
compress-lzf-1.0.0.jar
concurrentlinkedhashmap-lru-1.3.jar
concurrentlinkedhashmap-lru-1.4.jar
config-1.2.1.jar
crc32ex-0.1.1.jar
curator-client-2.7.1.jar
curator-framework-2.7.1.jar
curator-recipes-2.7.1.jar
disruptor-3.0.1.jar
disruptor-3.3.0.jar
dom4j-1.6.1.jar
ecj-4.4.2.jar
elasticsearch-1.5.1.jar
esapi-2.1.0.jar
findbugs-annotations-1.3.9-1.jar
gbench-0.4.3-groovy-2.4.jar
gmetric4j-1.0.3.jar
gpars-1.2.1.jar
gprof-0.3.1-groovy-2.4.jar
gremlin-console-3.1.0-incubating.jar
gremlin-core-3.1.0-incubating.jar
gremlin-driver-3.1.0-incubating.jar
gremlin-groovy-3.1.0-incubating.jar
gremlin-server-3.1.0-incubating.jar
gremlin-shaded-3.1.0-incubating.jar
groovy-2.4.9.jar
groovy-ant-2.4.9.jar
groovy-bsf-2.4.9.jar
groovy-console-2.4.9.jar
groovy-docgenerator-2.4.9.jar
groovy-groovydoc-2.4.9.jar
groovy-groovysh-2.4.9.jar
groovy-jmx-2.4.9.jar
groovy-json-2.4.9.jar
groovy-jsr223-2.4.9.jar
groovy-nio-2.4.9.jar
groovy-servlet-2.4.9.jar
groovy-sql-2.4.9.jar
groovy-swing-2.4.9.jar
groovy-templates-2.4.9.jar
groovy-test-2.4.9.jar
groovy-testng-2.4.9.jar
groovy-xml-2.4.9.jar
gson-2.2.4.jar
guava-12.0.1.jar
guava-16.0.1.jar
guava-16.0.jar
guice-3.0.jar
guice-servlet-3.0.jar
hadoop-annotations-2.7.2-IBM-12.jar
hadoop-annotations.jar
hadoop-auth-2.7.2-IBM-12.jar
hadoop-auth.jar
hadoop-client-2.7.2-IBM-12.jar
hadoop-common-2.7.2-IBM-12-tests.jar
hadoop-common-2.7.2-IBM-12.jar
hadoop-common-tests.jar
hadoop-common.jar
hadoop-gremlin-3.1.0-incubating.jar
hadoop-hdfs-2.7.2-IBM-12.jar
hadoop-mapreduce-client-app-2.7.2-IBM-12.jar
hadoop-mapreduce-client-common-2.7.2-IBM-12.jar
hadoop-mapreduce-client-core-2.7.2-IBM-12.jar
hadoop-mapreduce-client-jobclient-2.7.2-IBM-12.jar
hadoop-mapreduce-client-shuffle-2.7.2-IBM-12.jar
hadoop-nfs-2.7.2-IBM-12.jar
hadoop-nfs.jar
hadoop-yarn-api-2.7.2-IBM-12.jar
hadoop-yarn-client-2.7.2-IBM-12.jar
hadoop-yarn-common-2.7.2-IBM-12.jar
hadoop-yarn-server-common-2.7.2-IBM-12.jar
hamcrest-core-1.3.jar
hbase-annotations-1.2.0-IBM-7-tests.jar
hbase-annotations-1.2.0-IBM-7.jar
hbase-annotations.jar
hbase-client-1.2.0-IBM-7.jar
hbase-client.jar
hbase-common-1.2.0-IBM-7-tests.jar
hbase-common-1.2.0-IBM-7.jar
hbase-common.jar
hbase-examples-1.2.0-IBM-7.jar
hbase-examples.jar
hbase-external-blockcache-1.2.0-IBM-7.jar
hbase-external-blockcache.jar
hbase-hadoop-compat-1.2.0-IBM-7.jar
hbase-hadoop-compat.jar
hbase-hadoop2-compat-1.2.0-IBM-7.jar
hbase-hadoop2-compat.jar
hbase-it-1.2.0-IBM-7-tests.jar
hbase-it-1.2.0-IBM-7.jar
hbase-it.jar
hbase-prefix-tree-1.2.0-IBM-7.jar
hbase-prefix-tree.jar
hbase-procedure-1.2.0-IBM-7.jar
hbase-procedure.jar
hbase-protocol-1.2.0-IBM-7.jar
hbase-protocol.jar
hbase-resource-bundle-1.2.0-IBM-7.jar
hbase-resource-bundle.jar
hbase-rest-1.2.0-IBM-7.jar
hbase-rest.jar
hbase-server-1.2.0-IBM-7-tests.jar
hbase-server-1.2.0-IBM-7.jar
hbase-server.jar
hbase-shell-1.2.0-IBM-7.jar
hbase-shell.jar
hbase-thrift-1.2.0-IBM-7.jar
hbase-thrift.jar
hibernate-validator-4.3.0.Final.jar
high-scale-lib-1.0.6.jar
high-scale-lib-1.1.2.jar
hppc-0.7.1.jar
htrace-core-3.1.0-incubating.jar
httpclient-4.2.5.jar
httpclient-4.4.1.jar
httpcore-4.2.5.jar
httpcore-4.4.1.jar
httpmime-4.4.1.jar
ivy-2.3.0.jar
ivy-2.4.0.jar
jackson-annotations-2.4.4.jar
jackson-core-2.4.4.jar
jackson-core-asl-1.9.13.jar
jackson-core-asl-1.9.2.jar
jackson-databind-2.4.4.jar
jackson-datatype-json-org-2.4.4.jar
jackson-jaxrs-1.9.13.jar
jackson-mapper-asl-1.9.13.jar
jackson-mapper-asl-1.9.2.jar
jackson-module-scala_2.10-2.4.4.jar
jackson-xc-1.9.13.jar
jamm-0.3.0.jar
jamon-runtime-2.4.1.jar
jansi-1.11.jar
jasper-compiler-5.5.23.jar
jasper-runtime-5.5.23.jar
java-xmlbuilder-0.4.jar
javassist-3.18.0-GA.jar
javatuples-1.2.jar
javax.inject-1.jar
javax.inject.jar
javax.json-1.0.jar
javax.servlet-3.0.0.v201112011016.jar
javax.servlet-api-3.0.1.jar
jaxb-api-2.2.2.jar
jaxb-impl-2.2.3-1.jar
jbcrypt-0.3m.jar
jboss-logging-3.1.2.GA.jar
jcabi-log-0.14.jar
jcabi-manifests-1.1.jar
jcl-over-slf4j-1.7.12.jar
jcl-over-slf4j-1.7.7.jar
jcodings-1.0.8.jar
jcommander-1.47.jar
je-5.0.73.jar
jersey-client-1.9.jar
jersey-core-1.9.jar
jersey-guice-1.9.jar
jersey-json-1.9.jar
jersey-server-1.9.jar
jets3t-0.7.1.jar
jets3t-0.9.0.jar
jettison-1.1.jar
jettison-1.3.3.jar
jetty-6.1.26-ibm.jar
jetty-sslengine-6.1.26-ibm.jar
jetty-util-6.1.26-ibm.jar
jline-2.12.jar
jna-4.0.0.jar
joda-time-1.6.2.jar
joda-time-2.4.jar
joni-2.1.2.jar
jruby-complete-1.6.8-ibm-2.jar
jsch-0.1.50.jar
json-20090211_1.jar
json-simple-1.1.jar
json4s-ast_2.10-3.2.10.jar
json4s-core_2.10-3.2.10.jar
json4s-jackson_2.10-3.2.10.jar
jsp-2.1-6.1.14.jar
jsp-api-2.0.jar
jsp-api-2.1-6.1.14.jar
jsp-api-2.1.jar
jsr166y-1.7.0.jar
jsr305-1.3.9.jar
jsr305-3.0.0.jar
jts-1.13.jar
jul-to-slf4j-1.7.10.jar
junit-4.11.jar
junit-4.12.jar
junit-benchmarks-0.7.0.jar
kryo-2.21.jar
leveldbjni-all-1.8-IBM-3.jar
libthrift-0.9.2.jar
libthrift-0.9.3.jar
log4j-1.2.17.jar
log4j-over-slf4j-1.7.7.jar
logback-classic-1.1.3.jar
logback-core-1.1.3.jar
lucene-analyzers-common-4.10.4.jar
lucene-core-4.10.4.jar
lucene-grouping-4.10.4.jar
lucene-highlighter-4.10.4.jar
lucene-join-4.10.4.jar
lucene-memory-4.10.4.jar
lucene-misc-4.10.4.jar
lucene-queries-4.10.4.jar
lucene-queryparser-4.10.4.jar
lucene-sandbox-4.10.4.jar
lucene-spatial-4.10.4.jar
lucene-suggest-4.10.4.jar
lz4-1.3.0.jar
mesos-0.21.1-shaded-protobuf.jar
metrics-core-2.1.2.jar
metrics-core-2.2.0.jar
metrics-core-3.0.1.jar
metrics-core-3.1.0.jar
metrics-core-3.1.2.jar
metrics-ganglia-3.0.1.jar
metrics-graphite-3.0.1.jar
metrics-graphite-3.1.2.jar
metrics-json-3.1.2.jar
metrics-jvm-3.1.0.jar
metrics-jvm-3.1.2.jar
metrics-logback-3.1.0.jar
minlog-1.2.jar
mockito-all-1.8.5.jar
multiverse-core-0.7.0.jar
nekohtml-1.9.12.jar
netty-3.6.2.Final.jar
netty-3.8.0.Final.jar
netty-all-4.0.23.Final.jar
netty-all-4.0.29.Final.jar
netty-all-4.0.44.Final.jar
noggit-0.6.jar
objenesis-2.1.jar
ohc-core-0.3.4.jar
ohc-core-j8-0.3.4.jar
ojdbc6.jar
org.apache.servicemix.bundles.commons-csv-1.0-r706900_3.jar
oro-2.0.8.jar
paranamer-2.3.jar
paranamer-2.6.jar
phoenix-4.6.1-HBase-1.2.0-IBM-6-server.jar
phoenix-server.jar
pipes-2.6.0.jar
protobuf-java-2.5.0.jar
py4j-0.8.2.1.jar
pyrolite-4.4.jar
qdox-1.12.1.jar
randomizedtesting-runner-2.0.8.jar
ranger-hbase-plugin-shim-0.5.2-IBM-2.jar
ranger-hdfs-plugin-shim-0.5.2-IBM-2.jar
ranger-plugin-classloader-0.5.2-IBM-2.jar
ranger-yarn-plugin-shim-0.5.2-IBM-2.jar
reflectasm-1.07-shaded.jar
reflections-0.9.9-RC1.jar
reporter-config-base-3.0.0.jar
reporter-config3-3.0.0.jar
RoaringBitmap-0.4.5.jar
scala-compiler-2.10.0.jar
scala-library-2.10.5.jar
scalap-2.10.0.jar
servlet-api-2.4.jar
servlet-api-2.5-6.1.14.jar
servlet-api-2.5.jar
sesame-model-2.7.10.jar
sesame-rio-api-2.7.10.jar
sesame-rio-datatypes-2.7.10.jar
sesame-rio-languages-2.7.10.jar
sesame-rio-n3-2.7.10.jar
sesame-rio-ntriples-2.7.10.jar
sesame-rio-rdfxml-2.7.10.jar
sesame-rio-trig-2.7.10.jar
sesame-rio-trix-2.7.10.jar
sesame-rio-turtle-2.7.10.jar
sesame-util-2.7.10.jar
sigar-1.6.4.jar
slf4j-api-1.6.1.jar
slf4j-api-1.7.10.jar
slf4j-api-1.7.12.jar
slf4j-api-1.7.7.jar
slf4j-log4j12-1.7.10.jar
slf4j-log4j12-1.7.12.jar
snakeyaml-1.11.jar
snakeyaml-1.15.jar
snappy-java-1.0.5-IBM-3.jar
snappy-java-1.1.1.7-IBM-1.jar
snappy-java-1.1.1.7.jar
solr-solrj-5.5.0-IBM-2.jar
spark-core_2.10-1.5.1.jar
spark-gremlin-3.1.0-incubating.jar
spark-launcher_2.10-1.5.1.jar
spark-network-common_2.10-1.5.1.jar
spark-network-shuffle_2.10-1.5.1.jar
spark-unsafe_2.10-1.5.1.jar
spatial4j-0.4.1.jar
spymemcached-2.11.6.jar
ST4-4.0.8.jar
stax-api-1.0-2.jar
stax-api-1.0.1.jar
stax2-api-3.1.4.jar
stream-2.5.2.jar
stream-2.7.0.jar
stringtemplate-3.2.jar
super-csv-2.1.0.jar
tachyon-client-0.7.1.jar
tachyon-underfs-hdfs-0.7.1.jar
tachyon-underfs-local-0.7.1.jar
testng-6.8.13.jar
thrift-server-0.3.7.jar
tinkergraph-gremlin-3.1.0-incubating.jar
titan-all-1.0.0-IBM-13.jar
titan-berkeleyje-1.0.0.jar
titan-cassandra-1.0.0.jar
titan-core-1.0.0-IBM-13.jar
titan-es-1.0.0.jar
titan-hadoop-1.0.0-IBM-13.jar
titan-hbase-1.0.0-IBM-13.jar
titan-lucene-1.0.0.jar
titan-solr-1.0.0-IBM-13.jar
uncommons-maths-1.2.2a.jar
unused-1.0.0.jar
uuid-3.2.jar
validation-api-1.0.0.GA.jar
woodstox-core-asl-4.4.1.jar
xalan-2.7.0.jar
xercesImpl-2.9.1.jar
xml-apis-1.3.03.jar
xml-apis-1.3.04.jar
xml-apis-ext-1.3.04.jar
xmlenc-0.52.jar
xmlpull-1.1.3.1.jar
xom-1.2.5.jar
xstream-1.4.7.jar
xz-1.0.jar
zookeeper-3.4.6_IBM_4.jar
zookeeper.jar
我使用 IBM Open Platform 4.2.0 作为我的 hadoop 安装，上述 JAR 来自各种来源，例如 hadoop、hbase、titan、zookeeper 等的 lib 文件夹。
任何帮助将不胜感激!
最佳答案
主要的 Titan pom 在第 60 行 https://github.com/thinkaurelius/titan/blob/titan10/pom.xml#L60 中有一个兼容性列表。 就像泰坦文档一样 http://s3.thinkaurelius.com/docs/titan/1.0.0/version-compat.html
我的第一个猜测是您的 hbase 版本太新，但我会查看那里的兼容性列表。如果没有成功的话，我会查看其他子项目中的 pom.xml 文件。
顺便说一句，TitanDB 不再维护。 JanusGraph 是一个 Linux 基金会项目，在得到了相当多的支持下，它接续了 Titan 留下的工作。 http://janusgraph.org/
JanusGraph 文档表明它与您正在使用的 HBase 版本兼容。 http://docs.janusgraph.org/latest/version-compat.html
关于java.lang.IncompleteClassChangeError : Implementing class while using titan with hbase，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44055065/