[jira] [Created] (HBASE-25844) Fix Jersey for hbase-server processes

["Nick Dimiduk (Jira)" <ji...@apache.org>]

Nick Dimiduk created HBASE-25844:
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             Summary: Fix Jersey for hbase-server processes
                 Key: HBASE-25844
                 URL: https://issues.apache.org/jira/browse/HBASE-25844
             Project: HBase
          Issue Type: Task
          Components: master, regionserver
    Affects Versions: 3.0.0-alpha-1, 2.5.0
            Reporter: Nick Dimiduk


I spent some time trying to use Jersey from within the Master and it's not working. To summarize, we have unshaded resources from both jersey-server-1.19 and jersey-server-2.32 on the hbase-server classpath. Jersey's initialization uses ServiceLoader to look up concrete implementation classes of {{javax.ws.rs}} classes at runtime. Because we do not shade {{javax.ws.rs}} in hbase-thirdparty-jersey, an attempt to use shaded jersey-2.x still results in loading unshaded jersey-1.x jars, leading to an error like this

{noformat}
java.lang.AbstractMethodError: javax.ws.rs.core.UriBuilder.uri(Ljava/lang/String;)Ljavax/ws/rs/core/UriBuilder;
	at javax.ws.rs.core.UriBuilder.fromUri(UriBuilder.java:96)
	at org.apache.hbase.thirdparty.org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:275)
	at org.apache.hbase.thirdparty.org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
	at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:791)
	at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
	at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:112)
{noformat}

We cannot override what version of these classes are loaded at runtime via Java property because Jersey's load order implementation checks system properties as a last resort, not first thing as is claimed by javadoc.

So I can think of two solutions.
# One is to shade {{javax.ws.rs}} in hbase-thirdparty-jersey. This would shade both the interfaces and the resource files that are referenced at runtime, allowing for an entirely isolated jersey container instantiate.
# Another idea is to add a custom {{ClassLoader}} that is inserted before jersey is initialized. This would filter out resources that are "banned", allowing our desired implementation through.

Between these, I think (1) is better, but I don't know what else might break. I've made an effort of both, but with neither approach can I get a jersey environment to response from my resource class... either because the solution is incomplete, or because I don't have the jersey environment configured properly.

See also some discussion that happened over on Slack, https://apache-hbase.slack.com/archives/C13K8NVAM/p1618857521051700



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