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https://issues.apache.org/jira/browse/HBASE-30533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18142559#comment-18142559
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Hudson commented on HBASE-30533:
--------------------------------
Results for branch branch-3
[build #637 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-3/637/]:
(/) *{color:green}+1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-3/637/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk17 hadoop3 checks{color}
-- For more information [see jdk17
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-3/637/JDK17_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk21 hadoop3 checks{color}
-- For more information [see jdk21
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-3/637/JDK21_20Nightly_20Build_20Report_20_28Hadoop3_29/]
> TestMemcachedBlockCache.testCache fails after HBASE-30521
> ---------------------------------------------------------
>
> Key: HBASE-30533
> URL: https://issues.apache.org/jira/browse/HBASE-30533
> Project: HBase
> Issue Type: Bug
> Components: BlockCache
> Reporter: Xiao Liu
> Assignee: Xiao Liu
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 4.0.0-alpha-1, 2.7.0, 3.1.0, 3.0.1, 2.6.8
>
>
> {\{TestMemcachedBlockCache.testCache}} consistently fails on the nightly
> builds of all branches that HBASE-30521 went in to, e.g. [master
> #1520|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1520/]:
> {noformat}
> java.lang.IllegalStateException: Not a JSON Object: null
> at
> org.apache.hbase.thirdparty.com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:164)
> at
> org.apache.hadoop.hbase.io.hfile.CacheTestUtils.testConvertToJSON(CacheTestUtils.java:391)
> at
> org.apache.hadoop.hbase.io.hfile.TestMemcachedBlockCache.testCache(TestMemcachedBlockCache.java:134)
> {noformat}
> The test creates the cache as an anonymous subclass of
> \{{MemcachedBlockCache}}. Gson excludes anonymous and local classes, so
> \{{BlockCacheUtil.toJSON}} returns \{{"null"}} for it. This went unnoticed
> because \{{CacheTestUtils.testConvertToJSON}} only checked that the returned
> string was not null, until HBASE-30521 started parsing it as a JSON object.
> The PR build of HBASE-30521 did not catch it since only the hbase-server
> tests were run.
> Turn the anonymous subclass into an inner class so the cache is serialized
> like a real \{{MemcachedBlockCache}}.
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