MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
active 2023-08-17 → 2026-05-14 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 1002 days from 2023-08-17 to 2026-05-14. Pushes: 5 total, peak 2 in a day. Pull requests: 5 total, peak 1 in a day. Issues: 50 total, peak 6 in a day. Comments: 55 total, peak 8 in a day. Stars: 352 total, peak 4 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| jankotek | 27 | 5 | 1 | 12 |
| bratwurzt | 7 | 0 | 0 | 3 |
| siddhsql | 6 | 0 | 0 | 0 |
| tianyawenke | 4 | 0 | 0 | 3 |
| qasimleoo | 4 | 0 | 0 | 2 |
| mjschwaiger | 3 | 0 | 0 | 2 |
| igalkin | 3 | 0 | 0 | 1 |
| chkpnt | 3 | 0 | 0 | 1 |
| tlipkis | 3 | 0 | 0 | 1 |
| lhaeger | 3 | 0 | 0 | 2 |
| LeboyX | 3 | 0 | 0 | 3 |
| icreator | 3 | 0 | 0 | 1 |
| wxpid1 | 2 | 0 | 0 | 1 |
| Sayyiditow | 2 | 0 | 0 | 2 |
| Montaro2017 | 2 | 0 | 0 | 1 |
| MikeyCarter | 2 | 0 | 0 | 1 |
| slovdahl | 2 | 0 | 0 | 2 |
| AleksandrKovshariov | 2 | 0 | 1 | 0 |
| coderkun | 2 | 0 | 1 | 1 |
| rlbns | 2 | 0 | 0 | 0 |
Recent activity
Latest issues, pull requests and releases
- Issue comment#1053Semitronix-itplugin2026-01-07 04:12position beyond chunk 112
- Issue comment#1055mjschwaiger2025-12-06 14:44Request for new release
- Issue comment#1064ChrSchmidtHRO2025-12-06 12:59Switch from `org.lz4:lz4-java` to `at.yawk.lz4:lz4-java` due to CVE-2025-12183
- Issue#1063VinceCastro2025-09-26 17:29Map value keeps recreating
- Issue#10626548940172025-09-17 04:27custom key serializer is invalid
- Issue#1061ankushraghav2025-08-25 12:30MapDB 3.0.8 breaks Java 11 compatibility due to eclipse-collections version range
- Pull request#1060coderkun2025-08-01 14:09
- Issue comment#952coderkun2025-08-01 08:01Eclipse collections dependency
- Issue#1058rlbns2025-04-22 17:20Unable to notarize org.mapdb on MAC-OS
- Issue#1058rlbns2025-04-19 19:39Unable to notarize org.mapdb on MAC-OS
- Issue#1057jankod2025-02-23 14:20SortedTableMap fails with large datasets (30GB CSV) AssertionError
- Issue#1056icreator2025-01-27 20:43Big delay in 1.0.9 on DB.close()
- Issue comment#1056icreator2025-01-27 19:44Big delay in 1.0.9 on DB.close()
- Issue comment#1056jankotek2025-01-27 13:55Big delay in 1.0.9 on DB.close()
- Issue#1056icreator2025-01-27 05:32Delay on close() in MapDB 1.0.9 on DB.close()
- Issue comment#1055doppelrittberger2025-01-17 11:15Request for new release
- Issue comment#1055jankotek2025-01-01 16:56Request for new release
- Issue#1055doppelrittberger2024-12-08 12:46Request for new release
- Issue#1053wxpid12024-10-21 13:13position beyond chunk 112
- Issue comment#1052wxpid12024-10-21 13:02java.lang.ArrayIndexOutOfBoundsException: Index 21 out of bounds for length 21
- Pull request#1038kovsharov2024-10-18 18:44
- Issue#1051wxq8516852792024-09-04 07:12Does it support multi-layer map nesting?
- Issue comment#1042chkpnt2024-08-30 10:06NoClassDefFoundError regarding EnumEntries since MapDB 3.1.0
- Issue#1042chkpnt2024-08-30 10:06NoClassDefFoundError regarding EnumEntries since MapDB 3.1.0
- Issue#1050Buwaka2024-08-19 15:13Guava dependancy conflict
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 352 stars here means stars gained during the window, not the repo's star count.