[jira] [Updated] (ARROW-7506) [Java] JMH benchmarks should be called from main methods

[ https://issues.apache.org/jira/browse/ARROW-7506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7506: -- Labels: pull-request-available (was: ) > [Java] JMH benchmarks should be called from main

[jira] [Created] (ARROW-7506) [Java] JMH benchmarks should be called from main methods

Liya Fan created ARROW-7506: --- Summary: [Java] JMH benchmarks should be called from main methods Key: ARROW-7506 URL: https://issues.apache.org/jira/browse/ARROW-7506 Project: Apache Arrow Issue

[jira] [Updated] (ARROW-7505) [Java] Remove Netty dependency for ArrowBuf

[ https://issues.apache.org/jira/browse/ARROW-7505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7505: -- Labels: pull-request-available (was: ) > [Java] Remove Netty dependency for ArrowBuf >

[jira] [Created] (ARROW-7505) [Java] Remove Netty dependency for ArrowBuf

Liya Fan created ARROW-7505: --- Summary: [Java] Remove Netty dependency for ArrowBuf Key: ARROW-7505 URL: https://issues.apache.org/jira/browse/ARROW-7505 Project: Apache Arrow Issue Type:

[jira] [Created] (ARROW-7504) [GLib] Introduce value-returning garrow::check

Kenta Murata created ARROW-7504: --- Summary: [GLib] Introduce value-returning garrow::check Key: ARROW-7504 URL: https://issues.apache.org/jira/browse/ARROW-7504 Project: Apache Arrow Issue

[jira] [Resolved] (ARROW-7450) [CI][C++] test-ubuntu-18.04-cpp-static failing with linking error in arrow-io-hdfs-test

[ https://issues.apache.org/jira/browse/ARROW-7450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson resolved ARROW-7450. Resolution: Fixed Issue resolved by pull request 6130

[jira] [Updated] (ARROW-5338) [Format][Integration] Define how to test for delta dictionary support in the JSON integration test data format

[ https://issues.apache.org/jira/browse/ARROW-5338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-5338: --- Priority: Blocker (was: Major) > [Format][Integration] Define how to test for delta

[jira] [Updated] (ARROW-5279) [C++] Support reading delta dictionaries in IPC streams

[ https://issues.apache.org/jira/browse/ARROW-5279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-5279: --- Priority: Blocker (was: Major) > [C++] Support reading delta dictionaries in IPC streams >

[jira] [Updated] (ARROW-6883) [C++] Support sending delta DictionaryBatch or replacement DictionaryBatch in IPC stream writer class

[ https://issues.apache.org/jira/browse/ARROW-6883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-6883: --- Priority: Blocker (was: Major) > [C++] Support sending delta DictionaryBatch or replacement

[jira] [Updated] (ARROW-186) [Java] Make sure alignment and memory padding conform to spec

[ https://issues.apache.org/jira/browse/ARROW-186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-186: -- Labels: (was: pull-request-available) > [Java] Make sure alignment and memory padding conform

[jira] [Commented] (ARROW-186) [Java] Make sure alignment and memory padding conform to spec

[ https://issues.apache.org/jira/browse/ARROW-186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009232#comment-17009232 ] Neal Richardson commented on ARROW-186: --- Is this issue still valid? > [Java] Make sure alignment

[jira] [Updated] (ARROW-1277) Completing integration tests for major implemented data types

[ https://issues.apache.org/jira/browse/ARROW-1277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-1277: --- Priority: Blocker (was: Major) > Completing integration tests for major implemented data

[jira] [Updated] (ARROW-590) Add integration tests for Union types

[ https://issues.apache.org/jira/browse/ARROW-590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-590: -- Priority: Blocker (was: Major) > Add integration tests for Union types >

[jira] [Updated] (ARROW-7265) [Format][C++] Clarify the usage of typeIds in Union type documentation

[ https://issues.apache.org/jira/browse/ARROW-7265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-7265: --- Fix Version/s: 1.0.0 > [Format][C++] Clarify the usage of typeIds in Union type

[jira] [Updated] (ARROW-1692) [Python, Java] UnionArray round trip not working

[ https://issues.apache.org/jira/browse/ARROW-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-1692: --- Priority: Blocker (was: Major) > [Python, Java] UnionArray round trip not working >

[jira] [Updated] (ARROW-1636) [Format] Integration tests for null type

[ https://issues.apache.org/jira/browse/ARROW-1636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-1636: --- Priority: Blocker (was: Major) > [Format] Integration tests for null type >

[jira] [Updated] (ARROW-7475) [Rust] Create Arrow Stream writer

[ https://issues.apache.org/jira/browse/ARROW-7475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neville Dipale updated ARROW-7475: -- Fix Version/s: 1.0.0 > [Rust] Create Arrow Stream writer > - >

[jira] [Resolved] (ARROW-7471) [Python] Cython flake8 failures

[ https://issues.apache.org/jira/browse/ARROW-7471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kouhei Sutou resolved ARROW-7471. - Resolution: Fixed Issue resolved by pull request 6126

[jira] [Commented] (ARROW-7494) [Java] Remove reader index and writer index from ArrowBuf

[ https://issues.apache.org/jira/browse/ARROW-7494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009168#comment-17009168 ] Jacques Nadeau commented on ARROW-7494: --- What I'm saying: Reader and writer index are typically

[jira] [Resolved] (ARROW-7328) [CI] GitHub Actions should trigger on changes to GitHub Actions configuration

[ https://issues.apache.org/jira/browse/ARROW-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kouhei Sutou resolved ARROW-7328. - Fix Version/s: 1.0.0 Resolution: Fixed Issue resolved by pull request 6124

[jira] [Updated] (ARROW-7328) [CI] Github Actions should trigger on changes to Github Actions configuration

[ https://issues.apache.org/jira/browse/ARROW-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kouhei Sutou updated ARROW-7328: Component/s: Continuous Integration > [CI] Github Actions should trigger on changes to Github

[jira] [Updated] (ARROW-7328) [CI] GitHub Actions should trigger on changes to GitHub Actions configuration

[ https://issues.apache.org/jira/browse/ARROW-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kouhei Sutou updated ARROW-7328: Summary: [CI] GitHub Actions should trigger on changes to GitHub Actions configuration (was: [CI]

[jira] [Updated] (ARROW-7328) [CI] GitHub Actions should trigger on changes to GitHub Actions configuration

[ https://issues.apache.org/jira/browse/ARROW-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kouhei Sutou updated ARROW-7328: Description: Currently, when you only change something in the {{.github/workflows}} directory,

[jira] [Commented] (ARROW-7501) [C++] CMake build_thrift should build flex and bison if necessary

[ https://issues.apache.org/jira/browse/ARROW-7501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009146#comment-17009146 ] Francois Saint-Jacques commented on ARROW-7501: --- It doesn't look like OSX is

[jira] [Assigned] (ARROW-7309) [Python] Support HDFS federation viewfs://

[ https://issues.apache.org/jira/browse/ARROW-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou reassigned ARROW-7309: - Assignee: Fabian Höring > [Python] Support HDFS federation viewfs:// >

[jira] [Resolved] (ARROW-7309) [Python] Support HDFS federation viewfs://

[ https://issues.apache.org/jira/browse/ARROW-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou resolved ARROW-7309. --- Fix Version/s: 1.0.0 Resolution: Fixed Issue resolved by pull request 5957

[jira] [Updated] (ARROW-7450) [CI][C++] test-ubuntu-18.04-cpp-static failing with linking error in arrow-io-hdfs-test

[ https://issues.apache.org/jira/browse/ARROW-7450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7450: -- Labels: pull-request-available (was: ) > [CI][C++] test-ubuntu-18.04-cpp-static failing with

[jira] [Assigned] (ARROW-7450) [CI][C++] test-ubuntu-18.04-cpp-static failing with linking error in arrow-io-hdfs-test

[ https://issues.apache.org/jira/browse/ARROW-7450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Wes McKinney reassigned ARROW-7450: --- Assignee: Wes McKinney > [CI][C++] test-ubuntu-18.04-cpp-static failing with linking error

[jira] [Updated] (ARROW-7502) [Integration] Remove Spark Integration patch that not needed anymore

[ https://issues.apache.org/jira/browse/ARROW-7502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7502: -- Labels: pull-request-available (was: ) > [Integration] Remove Spark Integration patch that

[jira] [Created] (ARROW-7502) [Integration] Remove Spark Integration patch that not needed anymore

Bryan Cutler created ARROW-7502: --- Summary: [Integration] Remove Spark Integration patch that not needed anymore Key: ARROW-7502 URL: https://issues.apache.org/jira/browse/ARROW-7502 Project: Apache

[jira] [Commented] (ARROW-4856) [Integration] The spark integration test exceeds the maximum time limit on travis

[ https://issues.apache.org/jira/browse/ARROW-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009109#comment-17009109 ] Bryan Cutler commented on ARROW-4856: - I believe this is resolved, is that correct [~kszucs] ? >

[jira] [Resolved] (ARROW-2524) [Java] [TEST] Run spark integration tests regularly

[ https://issues.apache.org/jira/browse/ARROW-2524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Bryan Cutler resolved ARROW-2524. - Resolution: Fixed Closing this as Spark integration tests are being run nightly > [Java] [TEST]

[jira] [Resolved] (ARROW-7430) [Python] Add more docstrings to dataset bindings

[ https://issues.apache.org/jira/browse/ARROW-7430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou resolved ARROW-7430. --- Resolution: Fixed Issue resolved by pull request 6059

[jira] [Assigned] (ARROW-7367) [Python] Use np.full instead of np.array.repeat in ParquetDatasetPiece

[ https://issues.apache.org/jira/browse/ARROW-7367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Wes McKinney reassigned ARROW-7367: --- Assignee: Xavier Lacroze > [Python] Use np.full instead of np.array.repeat in

[jira] [Resolved] (ARROW-7367) [Python] Use np.full instead of np.array.repeat in ParquetDatasetPiece

[ https://issues.apache.org/jira/browse/ARROW-7367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Wes McKinney resolved ARROW-7367. - Fix Version/s: 1.0.0 Resolution: Fixed Issue resolved by pull request 5999

[jira] [Created] (ARROW-7501) [C++] CMake build_thrift should build flex and bison if necessary

Neal Richardson created ARROW-7501: -- Summary: [C++] CMake build_thrift should build flex and bison if necessary Key: ARROW-7501 URL: https://issues.apache.org/jira/browse/ARROW-7501 Project: Apache

[jira] [Created] (ARROW-7500) [C++][Dataset] regex_error in hive partition on centos7 and opensuse42

Neal Richardson created ARROW-7500: -- Summary: [C++][Dataset] regex_error in hive partition on centos7 and opensuse42 Key: ARROW-7500 URL: https://issues.apache.org/jira/browse/ARROW-7500 Project:

[jira] [Created] (ARROW-7499) [C++] CMake should collect libs when making static build

Neal Richardson created ARROW-7499: -- Summary: [C++] CMake should collect libs when making static build Key: ARROW-7499 URL: https://issues.apache.org/jira/browse/ARROW-7499 Project: Apache Arrow

[jira] [Resolved] (ARROW-7069) [C++][Dataset] Replace ConstantPartitionScheme with PrefixDictionaryPartitionScheme

[ https://issues.apache.org/jira/browse/ARROW-7069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ben Kietzman resolved ARROW-7069. - Fix Version/s: 1.0.0 Resolution: Fixed > [C++][Dataset] Replace ConstantPartitionScheme

[jira] [Commented] (ARROW-7498) [C++][Dataset] Rename DataFragment/DataSource/PartitionScheme

[ https://issues.apache.org/jira/browse/ARROW-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009056#comment-17009056 ] Ben Kietzman commented on ARROW-7498: - +1. Drilling into PartitionSchema: SchemaPartitionScheme ->

[jira] [Commented] (ARROW-7412) [C++][Dataset] Ensure that dataset code is robust to schemas with duplicate field names

[ https://issues.apache.org/jira/browse/ARROW-7412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17009057#comment-17009057 ] Ben Kietzman commented on ARROW-7412: - For now, we should probably just error if a field is

[jira] [Updated] (ARROW-7498) [C++][Dataset] Rename DataFragment/DataSource/PartitionScheme

[ https://issues.apache.org/jira/browse/ARROW-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Neal Richardson updated ARROW-7498: --- Description: DataFragment -> Fragment DataSource -> Source PartitionScheme ->

[jira] [Created] (ARROW-7498) [C++][Dataset] Rename DataFragment/DataSource/PartitionScheme

Francois Saint-Jacques created ARROW-7498: - Summary: [C++][Dataset] Rename DataFragment/DataSource/PartitionScheme Key: ARROW-7498 URL: https://issues.apache.org/jira/browse/ARROW-7498

[jira] [Created] (ARROW-7497) [Python] pandas master failures: pandas.util.testing is deprecated

Joris Van den Bossche created ARROW-7497: Summary: [Python] pandas master failures: pandas.util.testing is deprecated Key: ARROW-7497 URL: https://issues.apache.org/jira/browse/ARROW-7497

[jira] [Resolved] (ARROW-6994) [C++] Research jemalloc memory page reclamation configuration on macOS when background_thread option is unavailable

[ https://issues.apache.org/jira/browse/ARROW-6994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou resolved ARROW-6994. --- Resolution: Fixed Issue resolved by pull request 6100

[jira] [Updated] (ARROW-7435) Security issue: ValidateOffsets() does not prevent buffer over-read

[ https://issues.apache.org/jira/browse/ARROW-7435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7435: -- Labels: pull-request-available (was: ) > Security issue: ValidateOffsets() does not prevent

[jira] [Updated] (ARROW-7087) [Python] Table Metadata disappear when we write a partitioned dataset

[ https://issues.apache.org/jira/browse/ARROW-7087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7087: -- Labels: pull-request-available (was: ) > [Python] Table Metadata disappear when we write a

[jira] [Assigned] (ARROW-7435) Security issue: ValidateOffsets() does not prevent buffer over-read

[ https://issues.apache.org/jira/browse/ARROW-7435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou reassigned ARROW-7435: - Assignee: Antoine Pitrou > Security issue: ValidateOffsets() does not prevent buffer

[jira] [Commented] (ARROW-7045) [R] Factor type not preserved in Parquet roundtrip

[ https://issues.apache.org/jira/browse/ARROW-7045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008948#comment-17008948 ] Neal Richardson commented on ARROW-7045: Nice work. A PR would be great, thanks! > [R] Factor

[jira] [Resolved] (ARROW-7414) [R][Dataset] Implement PartitionSchemeDiscovery

[ https://issues.apache.org/jira/browse/ARROW-7414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ben Kietzman resolved ARROW-7414. - Resolution: Fixed Issue resolved by pull request 6077

[jira] [Updated] (ARROW-7430) [Python] Add more docstrings to dataset bindings

[ https://issues.apache.org/jira/browse/ARROW-7430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7430: -- Labels: dataset pull-request-available (was: dataset) > [Python] Add more docstrings to

[jira] [Updated] (ARROW-7471) [Python] Cython flake8 failures

[ https://issues.apache.org/jira/browse/ARROW-7471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7471: -- Labels: pull-request-available (was: ) > [Python] Cython flake8 failures >

[jira] [Assigned] (ARROW-7471) [Python] Cython flake8 failures

[ https://issues.apache.org/jira/browse/ARROW-7471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Antoine Pitrou reassigned ARROW-7471: - Assignee: Antoine Pitrou > [Python] Cython flake8 failures >

[jira] [Commented] (ARROW-4526) [Java] Remove Netty references from ArrowBuf and move Allocator out of vector package

[ https://issues.apache.org/jira/browse/ARROW-4526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008814#comment-17008814 ] Liya Fan commented on ARROW-4526: - For step 1, I think we can first create a issue that remove Netty

[jira] [Updated] (ARROW-7496) [CI][Gandiva] Use static protobuf dependency while building Gandiva jar

[ https://issues.apache.org/jira/browse/ARROW-7496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Praveen Kumar updated ARROW-7496: - Fix Version/s: (was: 1.0.0) > [CI][Gandiva] Use static protobuf dependency while building

[jira] [Updated] (ARROW-7496) [CI][Gandiva] Use static protobuf dependency while building Gandiva jar

[ https://issues.apache.org/jira/browse/ARROW-7496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Praveen Kumar updated ARROW-7496: - Component/s: C++ - Gandiva > [CI][Gandiva] Use static protobuf dependency while building Gandiva

[jira] [Resolved] (ARROW-7496) [CI][Gandiva] Use static protobuf dependency while building Gandiva jar

[ https://issues.apache.org/jira/browse/ARROW-7496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Praveen Kumar resolved ARROW-7496. -- Fix Version/s: 1.0.0 Resolution: Fixed Issue resolved by pull request 6125

[jira] [Comment Edited] (ARROW-7045) [R] Factor type not preserved in Parquet roundtrip

[ https://issues.apache.org/jira/browse/ARROW-7045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008799#comment-17008799 ] Hiroaki Yutani edited comment on ARROW-7045 at 1/6/20 12:29 PM: I think I

[jira] [Commented] (ARROW-7045) [R] Factor type not preserved in Parquet roundtrip

[ https://issues.apache.org/jira/browse/ARROW-7045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008799#comment-17008799 ] Hiroaki Yutani commented on ARROW-7045: --- I think I found the cause. This is because

[jira] [Updated] (ARROW-4415) [Doc] Add docker-compose to easily run apache/arrow-site

[ https://issues.apache.org/jira/browse/ARROW-4415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Krisztian Szucs updated ARROW-4415: --- Summary: [Doc] Add docker-compose to easily run apache/arrow-site (was: [Doc] Port run_site

[jira] [Commented] (ARROW-4415) [Doc] Port run_site docker to the new compose setup

[ https://issues.apache.org/jira/browse/ARROW-4415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008765#comment-17008765 ] Krisztian Szucs commented on ARROW-4415: The code has been removed from under the dev directory

[jira] [Resolved] (ARROW-2602) [Packaging] Automate build of development docker containers

[ https://issues.apache.org/jira/browse/ARROW-2602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Krisztian Szucs resolved ARROW-2602. Resolution: Fixed The docker images are available under

[jira] [Commented] (ARROW-7042) Discuss for ARM supporting and ARM CI

[ https://issues.apache.org/jira/browse/ARROW-7042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008731#comment-17008731 ] Uwe Korn commented on ARROW-7042: - Conda is nowadays supported on arm: 

[jira] [Updated] (ARROW-7496) [CI][Gandiva] Use static protobuf dependency while building Gandiva jar

[ https://issues.apache.org/jira/browse/ARROW-7496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7496: -- Labels: pull-request-available (was: ) > [CI][Gandiva] Use static protobuf dependency while

[jira] [Created] (ARROW-7496) [CI][Gandiva] Use static protobuf dependency while building Gandiva jar

Projjal Chanda created ARROW-7496: - Summary: [CI][Gandiva] Use static protobuf dependency while building Gandiva jar Key: ARROW-7496 URL: https://issues.apache.org/jira/browse/ARROW-7496 Project:

[jira] [Updated] (ARROW-7328) [CI] Github Actions should trigger on changes to Github Actions configuration

[ https://issues.apache.org/jira/browse/ARROW-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated ARROW-7328: -- Labels: pull-request-available (was: ) > [CI] Github Actions should trigger on changes to

[jira] [Commented] (ARROW-7494) [Java] Remove reader index and writer index from ArrowBuf

[ https://issues.apache.org/jira/browse/ARROW-7494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17008693#comment-17008693 ] Ji Liu commented on ARROW-7494: --- ??In general, a slice can be used instead of a reader/writer index