(Windows Subsystem for Linux : Debian GNU/Linux) error MDB_BAD_TXN: Transaction must abort, has a child, or is invalid

[TnkPpj]

When command in install

make && make test
It show

End-to-end tests for a database context loading should:

• creating a new context....
  Error: MDB_BAD_TXN: Transaction must abort, has a child, or is invalid
  runtest: test/test_context.cpp:73: void test_context(): Assertion `false' failed.
  Aborted (core dumped)

And i test example code in get-started build passed but when run it error

terminate called after throwing an instance of 'nogdb::Error'
what(): MDB_BAD_TXN: Transaction must abort, has a child, or is invalid
Aborted (core dumped)

[pj4dev]

Hi @TnkPpj,

Could you try to compile and run LMDB on your machine with the same environment as running NogDB?

Here is the repository and source code of LMDB
https://github.com/LMDB/lmdb/tree/mdb.master/libraries/liblmdb

If LMDB alone can work without any problems, this might be some sorts of bugs in regards to handling LMDB txn inside NogDB layer.

Thanks,

[TnkPpj]

when make test in lmdb show

./mtest && ./mdb_stat testdb
mtest.c:50: mdb_env_open(env, "./testdb", MDB_FIXEDMAP , 0664): Exec format error
Aborted (core dumped)
Makefile:61: recipe for target 'test' failed
make: *** [test] Error 134

[pj4dev]

Hi @TnkPpj ,

Could you try mkdir testdb && chmod 664 testdb before running ./mtest again?

Thanks,

[Bibliofile]

I did a bit of research on this due to a completely unrelated project, and wanted to confirm that this isn't a problem with the NogDB layer. lmdb doesn't work on WSL (at least partly) due to mmap(NULL, ...) failing on zero length files. See microsoft/WSL#3451

[pj4dev]

@Bibliofile, thanks for your research and letting us know about this issue.