The Maven facet attempts to fill in information about a pom using the MavenModels.readModel function. If the supplied input stream is empty, this throws an exception and causes issues upstream when we (for example) attempt to migrate a zero-length pom or deploy one to a hosted repository (see stack trace of resulting HTTP 500 error below).
The javadoc for the method in question says that it should "return {@code null} if input not parsable". It seems more consistent to return null when the input stream is empty instead of throwing an EOFException, but what would that cause unintended side-effects?
For reference, NX2 does not reject deployments of empty POMs.
2017-02-08 19:25:17,516+0100 WARN [qtp571182704-310] admin org.sonatype.nexus.repository.httpbridge.internal.ViewServlet - Service failure
java.io.EOFException: input contained no data
at org.codehaus.plexus.util.xml.pull.MXParser.fillBuf(MXParser.java:3037) [na:na]
at org.codehaus.plexus.util.xml.pull.MXParser.more(MXParser.java:3080) [na:na]
at org.codehaus.plexus.util.xml.pull.MXParser.parseProlog(MXParser.java:1451) [na:na]
at org.codehaus.plexus.util.xml.pull.MXParser.nextImpl(MXParser.java:1436) [na:na]
at org.codehaus.plexus.util.xml.pull.MXParser.next(MXParser.java:1131) [na:na]
at org.apache.maven.model.io.xpp3.MavenXpp3Reader.read(MavenXpp3Reader.java:3811) [na:na]
at org.apache.maven.model.io.xpp3.MavenXpp3Reader.read(MavenXpp3Reader.java:557) [na:na]
at org.apache.maven.model.io.xpp3.MavenXpp3Reader.read(MavenXpp3Reader.java:586) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenModels.readModel(MavenModels.java:132) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenFacetImpl.fillInFromModel(MavenFacetImpl.java:367) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenFacetImpl.putArtifact(MavenFacetImpl.java:325) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenFacetImpl.doPutAssetBlob(MavenFacetImpl.java:295) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenFacetImpl.doPut(MavenFacetImpl.java:248) [na:na]
at org.sonatype.nexus.transaction.TransactionalWrapper.proceedWithTransaction(TransactionalWrapper.java:56) [na:na]
at org.sonatype.nexus.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:54) [na:na]
at org.sonatype.nexus.repository.maven.internal.MavenFacetImpl.put(MavenFacetImpl.java:200) [na:na]
at org.sonatype.nexus.repository.maven.internal.hosted.HostedHandler.doPut(HostedHandler.java:87) [na:na]
at org.sonatype.nexus.repository.maven.internal.hosted.HostedHandler.handle(HostedHandler.java:61) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.storage.UnitOfWorkHandler.handle(UnitOfWorkHandler.java:39) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.handlers.ContentHeadersHandler.handle(ContentHeadersHandler.java:44) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.maven.internal.VersionPolicyHandler.handle(VersionPolicyHandler.java:60) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.http.PartialFetchHandler.handle(PartialFetchHandler.java:55) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.handlers.ConditionalRequestHandler.handle(ConditionalRequestHandler.java:72) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at com.sonatype.nexus.clm.internal.QuarantineContributedHandler.handle(QuarantineContributedHandler.java:62) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.handlers.HandlerContributor.handle(HandlerContributor.java:67) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.handlers.ExceptionHandler.handle(ExceptionHandler.java:43) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.security.SecurityHandler.handle(SecurityHandler.java:52) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.handlers.TimingHandler.handle(TimingHandler.java:46) [na:na]
at org.sonatype.nexus.repository.view.Context.proceed(Context.java:80) [na:na]
at org.sonatype.nexus.repository.view.Context.start(Context.java:114) [na:na]
at org.sonatype.nexus.repository.view.Router.dispatch(Router.java:63) [na:na]
at org.sonatype.nexus.repository.view.ConfigurableViewFacet.dispatch(ConfigurableViewFacet.java:52) [na:na]
at org.sonatype.nexus.repository.view.ConfigurableViewFacet.dispatch(ConfigurableViewFacet.java:43) [na:na]
at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.dispatchAndSend(ViewServlet.java:197) [na:na]
at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.doService(ViewServlet.java:159) [na:na]
at org.sonatype.nexus.repository.httpbridge.internal.ViewServlet.service(ViewServlet.java:116) [na:na]
- causes
-
NEXUS-12081 Upgrade never completes if source repository has zero length files in it
-
- Closed
-