[ https://issues.apache.org/jira/browse/HIVE-21508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929259#comment-16929259 ]
Hive QA commented on HIVE-21508: -------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 11s{color} | {color:red} /data/hiveptest/logs/PreCommit-HIVE-Build-18584/patches/PreCommit-HIVE-Build-18584.patch does not apply to master. Rebase required? Wrong Branch? See http://cwiki.apache.org/confluence/display/Hive/HowToContribute for help. {color} | \\ \\ || Subsystem || Report/Notes || | Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-18584/yetus.txt | | Powered by | Apache Yetus http://yetus.apache.org | This message was automatically generated. > ClassCastException when initializing HiveMetaStoreClient on JDK10 or newer > -------------------------------------------------------------------------- > > Key: HIVE-21508 > URL: https://issues.apache.org/jira/browse/HIVE-21508 > Project: Hive > Issue Type: Bug > Components: Clients > Affects Versions: 3.2.0, 2.3.4 > Reporter: Adar Dembo > Assignee: Ana Jalba > Priority: Major > Fix For: 2.4.0, 4.0.0, 2.3.7 > > Attachments: HIVE-21508.1.patch, HIVE-21508.2.branch-2.3.patch, > HIVE-21508.3.branch-2.patch, HIVE-21508.4.branch-3.1.patch, > HIVE-21508.5.branch-3.1.patch, HIVE-21508.patch > > > There's this block of code in {{HiveMetaStoreClient:resolveUris}} (called > from the constructor) on master: > {noformat} > private URI metastoreUris[]; > ... > if (MetastoreConf.getVar(conf, > ConfVars.THRIFT_URI_SELECTION).equalsIgnoreCase("RANDOM")) { > List uriList = Arrays.asList(metastoreUris); > Collections.shuffle(uriList); > metastoreUris = (URI[]) uriList.toArray(); > } > {noformat} > The cast to {{URI[]}} throws a {{ClassCastException}} beginning with JDK 10, > possibly with JDK 9 as well. Note that {{THRIFT_URI_SELECTION}} defaults to > {{RANDOM}} so this should affect anyone who creates a > {{HiveMetaStoreClient}}. On master this can be overridden with {{SEQUENTIAL}} > to avoid the broken case; I'm working against 2.3.4 where there's no such > workaround. > [Here's|https://stackoverflow.com/questions/51372788/array-cast-java-8-vs-java-9] > a StackOverflow post that explains the issue in more detail. Interestingly, > the author described the issue in the context of the HMS; not sure why there > was no follow up with a Hive bug report. -- This message was sent by Atlassian Jira (v8.3.2#803003)