apache/parquet-java

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Apache Parquet Java

Stars: 3.1k
Forks: 1.6k
Open beginner issues: 0
Indexed issues: 580
Avg merge: 3d 23h
Merged PRs (30d): 30

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 20, 2026
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

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578 open issues indexed

Parquet statistics stats_null_count is wrong for large json string colums Open

Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2786 · 2 comments · Opened Jun 4, 2023
RecordReaderImplementation throw ArrayIndexOutOfBoundsException Open

Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/parquet-java#2780 · 1 comment · Opened May 10, 2023
Bump thrift to 0.18.1 Open

Component: Parquet Component: Thrift Priority: Major Type: enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

apache/parquet-java#2769 · Opened Apr 14, 2023
Postpone dictionary encoding decision for starting null pages. Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2749 · Opened Mar 2, 2023
ParquetRewriter supports merging files by record Open

Component: Java Component: Parquet Priority: Major Type: task

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/parquet-java#2746 · Opened Feb 16, 2023
Improve dictionary filter evaluating notEq Open

Component: Parquet Priority: Minor Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/parquet-java#2743 · Opened Feb 15, 2023
record count for row group size check configurable Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/parquet-java#2740 · Opened Feb 9, 2023
DateTimeFormatter is used in static context, but not thread safe Open

Component: Java Component: Parquet Priority: Trivial Type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

apache/parquet-java#2738 · 1 comment · Opened Feb 7, 2023
Replace log4j1 with reload4j Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2737 · 2 comments · Opened Feb 6, 2023
Improve performance when filters in RowGroupFilter can match exactly Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#1655 · Opened Feb 4, 2023
Parquet java vector decode optimization Long for Little Endian Open

Component: Parquet Priority: Major Type: task

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2736 · Opened Jan 29, 2023
Parquet java vector decode optimization Long for Big Endian Open

Component: Parquet Priority: Minor Type: task

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/parquet-java#2735 · Opened Jan 29, 2023
Parquet java vector decode optimization for Big Endian Open

Component: Parquet Priority: Minor Type: task

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#1654 · Opened Jan 29, 2023
Parquet Travis CI jobs to be turned off February 15th Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 20/100

apache/parquet-java#2734 · 6 comments · Opened Jan 24, 2023
Parquet Data Masking for Column Encryption Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/parquet-java#1652 · 3 comments · Opened Jan 4, 2023
Parquet writer classes don't close underlying output stream in case of errors. Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

apache/parquet-java#2727 · 2 comments · Opened Nov 25, 2022
Support re-encryption in ColumnEncryptor Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/parquet-java#2726 · Opened Nov 17, 2022
Add an alternative InputFile.newStream that allow an input range Open

Component: Parquet Priority: Minor Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 20/100

apache/parquet-java#2725 · Opened Nov 10, 2022
Accelerate CI by commonizing thrift build and leveraging cache Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2723 · Opened Oct 26, 2022
Make ParquetReadOptions and HadoopReadOptions extendable Open

Component: Parquet Priority: Minor Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2722 · Opened Oct 24, 2022
checkBlockSizeReached zero record size perf issue Open

Component: Java Component: Parquet Priority: Minor Type: bug

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

apache/parquet-java#2720 · Opened Oct 6, 2022
parquet.encryption.plaintext.footer parameter being true, code expects parquet.encryption.footer.key Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/parquet-java#2716 · 1 comment · Opened Sep 20, 2022
Encrypting only one field in nested field prevents reading of other fields in nested field without keys Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#1649 · 7 comments · Opened Sep 20, 2022
byte array has better performance than ByteBuffer Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

apache/parquet-java#2714 · Opened Sep 14, 2022
byte array has better performance than ByteBuffer Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2713 · 1 comment · Opened Sep 14, 2022
Improve SnappyCompressor buffer expansion performance Open

Component: Java Component: Parquet Priority: Minor Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/parquet-java#1647 · Opened Sep 4, 2022
Fix statistics issue of Column Encryptor Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 15/100

apache/parquet-java#2710 · Opened Sep 3, 2022
Handle unknown logical types Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2709 · Opened Aug 31, 2022
parquet-cli fails at supporting parquet-protobuf generated files Open

Component: CLI Component: Parquet Priority: Critical Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2708 · 5 comments · Opened Aug 31, 2022
make the default behavior for proto writing not-backwards compatible Open

Component: Parquet Component: Protobuf Priority: Minor Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2707 · Opened Aug 30, 2022
Encrypting the entire table is impossible Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 20/100

apache/parquet-java#1645 · Opened Aug 18, 2022
Empty projection returns the wrong number of rows when column index is enabled Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2702 · 1 comment · Opened Aug 5, 2022
Potential bug in ParquetWriteProtocol Open

Component: Parquet Priority: Minor Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/parquet-java#2701 · 1 comment · Opened Jul 29, 2022
parquet writer runs into OOM during writing Open

Component: Avro Component: Parquet Priority: Blocker Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2699 · Opened Jul 13, 2022
remove deprecated PathGlobPattern and DeprecatedFieldProjectionFilter to compile on hadoop 3.2+ Open

Component: Parquet Component: Thrift Priority: Major Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 38/100

apache/parquet-java#2698 · 1 comment · Opened Jul 12, 2022
Column bloom filter: Show bloom filters in tools Open

Component: Parquet Priority: Minor Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/parquet-java#2693 · 4 comments · 2 reactions · Opened Jun 10, 2022
Cannot read schema from parquet file Open

Component: Avro Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2690 · 3 comments · Opened Jun 7, 2022
zstd compressor and decompressor use the same configuration Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/parquet-java#2689 · 1 comment · Opened Jun 7, 2022
Drop Hadoop 2 input stream reflection from parquet-hadoop Open

Component: Java Component: Parquet Priority: Minor Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/parquet-java#2688 · Opened Jun 6, 2022
Implement async IO for Parquet file reader Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/parquet-java#2686 · Opened May 16, 2022
AvroParquetWriter write to s3 bucket throws data intergrity exception Open

Component: Parquet Priority: Major Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/parquet-java#2684 · 1 comment · Opened May 13, 2022
parquet-cli with hadoop throws java.lang.RuntimeException on any parquet file access Open

Component: CLI Component: Parquet Priority: Blocker Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/parquet-java#2681 · 4 comments · Opened Apr 25, 2022
Controlling memory utilization by ParquetReader Open

Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/parquet-java#2679 · Opened Apr 23, 2022
parquet-cli unable to read UUID values Open

Component: CLI Component: Parquet Priority: Minor Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/parquet-java#1641 · 13 comments · Opened Apr 22, 2022
Performance optimizations: Merged all LittleEndianDataInputStream functionality into ByteBufferInputStream Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2674 · 2 comments · Opened Apr 1, 2022
Support Quantile Compression q_compress column codec Open

Component: C++ Component: Format Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/parquet-java#2672 · Opened Feb 28, 2022
Thread safety bug in CodecFactory Open

Component: Java Component: Parquet Priority: Major Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

apache/parquet-java#2669 · 9 comments · Opened Feb 17, 2022
ParquetFileReader has a currentBlock information in a private field Open

Component: Avro Component: Parquet Priority: Major Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/parquet-java#2668 · 1 comment · Opened Feb 15, 2022
Adding Bloom filter to small Parquet file bloats in size X1700 Open

Component: CLI Component: Java Component: Parquet Priority: Critical Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/parquet-java#2667 · 4 comments · Opened Feb 14, 2022
Cell Level Encryption Open

Component: Java Component: Parquet Priority: Major Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 15/100

apache/parquet-java#2664 · 1 comment · Opened Jan 27, 2022

apache/parquet-java

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