There are 2 modules, which import 3rd module. Each of them uses different prefix.
import openconfig-mpls-types { prefix "oc-mplst"; } import openconfig-mpls-types { prefix "oc-mpls-types"; }
Code generation fails with following error.
Caused by: java.lang.IllegalArgumentException: Multiple entries with same key: QNameModule{ns=http://openconfig.net/yang/mpls-types, rev=2018-11-21}=oc-mplst and QNameModule{ns=http://openconfig.net/yang/mpls-types, rev=2018-11-21}=oc-mpls-types
at com.google.common.collect.ImmutableMap.conflictException (ImmutableMap.java:215)
at com.google.common.collect.ImmutableMap.checkNoConflict (ImmutableMap.java:209)
at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket (RegularImmutableMap.java:146)
at com.google.common.collect.RegularImmutableMap.fromEntryArray (RegularImmutableMap.java:109)
at com.google.common.collect.ImmutableMap$Builder.build (ImmutableMap.java:394)
at org.opendaylight.yangtools.yang.model.export.StatementPrefixResolver.forModule (StatementPrefixResolver.java:120)
at org.opendaylight.yangtools.yang.model.export.DeclaredStatementFormatter.toYangTextSnippet (DeclaredStatementFormatter.java:51)
at org.opendaylight.mdsal.binding.java.api.generator.BaseTemplate.appendYangSnippet (BaseTemplate.java:474)
at org.opendaylight.mdsal.binding.java.api.generator.BaseTemplate.appendSnippet (BaseTemplate.java:442)
at org.opendaylight.mdsal.binding.java.api.generator.BaseTemplate.formatDataForJavaDoc (BaseTemplate.java:393)
at org.opendaylight.mdsal.binding.java.api.generator.InterfaceTemplate.body (InterfaceTemplate.java:87)
at org.opendaylight.mdsal.binding.java.api.generator.BaseTemplate.generate (BaseTemplate.java:103)
at org.opendaylight.mdsal.binding.java.api.generator.InterfaceGenerator.generate (InterfaceGenerator.java:34)
at org.opendaylight.mdsal.binding.java.api.generator.GeneratorJavaFile$GeneratorStringSupplier.get (GeneratorJavaFile.java:52)
at org.opendaylight.mdsal.binding.java.api.generator.GeneratorJavaFile$GeneratorStringSupplier.get (GeneratorJavaFile.java:41)
at org.opendaylight.mdsal.binding.maven.api.gen.plugin.CodeGeneratorImpl$GenerationTask.generateFile (CodeGeneratorImpl.java:282)