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https://issues.apache.org/jira/browse/HIVE-21924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16944920#comment-16944920
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Hive QA commented on HIVE-21924:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 1m
56s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m
29s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 8m
2s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 2m
45s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 4m
25s{color} | {color:blue} ql in master has 1551 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 7m
54s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m
25s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m
50s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 8m
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 8m
13s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 2m
49s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
1s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 4m
34s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 8m
7s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
13s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 66m 23s{color} |
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests | asflicense javac javadoc findbugs checkstyle compile |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian
3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-18873/dev-support/hive-personality.sh
|
| git revision | master / 9524a0b |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.1 |
| modules | C: ql . itests U: . |
| Console output |
http://104.198.109.242/logs//PreCommit-HIVE-Build-18873/yetus.txt |
| Powered by | Apache Yetus http://yetus.apache.org |
This message was automatically generated.
> Split text files even if header/footer exists
> ---------------------------------------------
>
> Key: HIVE-21924
> URL: https://issues.apache.org/jira/browse/HIVE-21924
> Project: Hive
> Issue Type: Improvement
> Components: File Formats
> Affects Versions: 2.4.0, 4.0.0, 3.2.0
> Reporter: Prasanth Jayachandran
> Assignee: Mustafa Iman
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21924.2.patch, HIVE-21924.3.patch,
> HIVE-21924.4.patch, HIVE-21924.5.patch, HIVE-21924.patch
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> https://github.com/apache/hive/blob/967a1cc98beede8e6568ce750ebeb6e0d048b8ea/ql/src/java/org/apache/hadoop/hive/ql/io/HiveInputFormat.java#L494-L503
>
> {code}
> int headerCount = 0;
> int footerCount = 0;
> if (table != null) {
> headerCount = Utilities.getHeaderCount(table);
> footerCount = Utilities.getFooterCount(table, conf);
> if (headerCount != 0 || footerCount != 0) {
> // Input file has header or footer, cannot be splitted.
> HiveConf.setLongVar(conf, ConfVars.MAPREDMINSPLITSIZE,
> Long.MAX_VALUE);
> }
> }
> {code}
> this piece of code makes the CSV (or any text files with header/footer) files
> not splittable if header or footer is present.
> If only header is present, we can find the offset after first line break and
> use that to split. Similarly for footer, may be read few KB's of data at the
> end and find the last line break offset. Use that to determine the data range
> which can be used for splitting. Few reads during split generation are
> cheaper than not splitting the file at all.
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