I don't see patch attached.
Please create RATIS JIRA and attach there.
Thanks
On Mon, May 7, 2018 at 10:24 AM, Nandakumar Vadivelu <
nvadiv...@hortonworks.com> wrote:
> Hi All,
>
> Below is the exception which we get with Ratis 0.2.0
>
> java.lang.NoSuchFieldError: CONTEXT_SPAN_KEY
> at org.apache.ratis.shaded.io.grpc.internal.CensusTracingModule$
> ServerTracer.filterContext(CensusTracingModule.java:340)
> at org.apache.ratis.shaded.io.grpc.internal.StatsTraceContext.
> serverFilterContext(StatsTraceContext.java:121)
> at org.apache.ratis.shaded.io.grpc.internal.ServerImpl$
> ServerTransportListenerImpl.createContext(ServerImpl.java:482)
> at org.apache.ratis.shaded.io.grpc.internal.ServerImpl$
> ServerTransportListenerImpl.streamCreated(ServerImpl.java:416)
> <stack trace truncated>
>
>
> The problem is because of two different definition of
> io.opencensus.trace.unsafe.ContextUtils class present in the classpath.
> The reason for having two different definition of ContextUtils in classpath
> is due to the fact that we are shading/relocating io.grpc and not
> io.opencensus.
>
>
> With shading we are generating the below definition which ends up in
> ratis-proto-shaded jar
>
> package io.opencensus.trace.unsafe;
>
> import org.apache.ratis.shaded.io.grpc.Context;
> import io.opencensus.trace.Span;
>
> /**
> * Util methods/functionality to interact with the {@link
> org.apache.ratis.shaded.io.grpc.Context}.
> *
> * <p>Users must interact with the current Context via the public APIs in
> {@link
> * io.opencensus.trace.Tracer} and avoid usages of the {@link
> #CONTEXT_SPAN_KEY} directly.
> *
> * @since 0.5
> */
> public final class ContextUtils {
> // No instance of this class.
> private ContextUtils() {}
>
> /**
> * The {@link org.apache.ratis.shaded.io.grpc.Context.Key} used to
> interact with {@link org.apache.ratis.shaded.io.grpc.Context}.
> *
> * @since 0.5
> */
> public static final Context.Key<Span> CONTEXT_SPAN_KEY =
> Context.key("opencensus-trace-span-key");
> }
>
>
> Since we have added io.opencensus as direct dependency in ratis-grpc we
> get the below definition in io.opencensus:opencensus-api:jar
>
> package io.opencensus.trace.unsafe;
>
> import io.grpc.Context;
> import io.opencensus.trace.Span;
>
> /**
> * Util methods/functionality to interact with the {@link io.grpc.Context}.
> *
> * <p>Users must interact with the current Context via the public APIs in
> {@link
> * io.opencensus.trace.Tracer} and avoid usages of the {@link
> #CONTEXT_SPAN_KEY} directly.
> *
> * @since 0.5
> */
> public final class ContextUtils {
> // No instance of this class.
> private ContextUtils() {}
>
> /**
> * The {@link io.grpc.Context.Key} used to interact with {@link
> io.grpc.Context}.
> *
> * @since 0.5
> */
> public static final Context.Key<Span> CONTEXT_SPAN_KEY =
> Context.key("opencensus-trace-span-key");
> }
>
> Both of the jars end up in classpath and ContextUtils is getting loaded
> from io.opencensus:opencensus-api:jar which is causing the problem.
>
> The simple fix would be to remove the dependency of io.opencensus from
> ratis-grpc/pom.xml (patch for the same is attached in this mail). This is
> not a permanent fix, as any application might bring in
> io.opencensus:opencensus-api:jar of its own.
>
> We have to find a way to shade io.opencensus:opencensus-api:jar.
>
> Note: from the comment in ratis-proto-shaded/pom.xml: Cannot relocate
> io.opencensus due to AutoValue code generation
>
>
> -Nanda
>
> On 5/7/18, 3:28 PM, "Lokesh Jain" <lj...@hortonworks.com> wrote:
>
> We found an issue while updating ozone to Ratis snapshot build
> 0.1.1-alpha-4309324-SNAPSHOT (https://issues.apache.org/
> jira/browse/HDDS-19). I feel we should hold the release till this is
> fixed. Please let us know of your opinion as well.
>
> Thanks
> Lokesh
>
>
>
>
