carlopires@gmail.com wrote:

Full_Name: Carlo Pires Version: LMDB 0.9.14 OS: Ubuntu Linux 14.04 LTS URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (177.53.184.142)

LMDB 0.9.14 is refusing to process new transactions after map resize. The following test case shows the error:

Thanks for the report, fixed in mdb.master.

/* mtest7.c - memory-mapped database tester/toy */ /* Tests for DB map resize */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include "lmdb.h"

#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) #define EX(err, expr) CHECK((rc = (expr)) == (err), #expr) #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0)) #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))

int main(int argc,char * argv[]) { int rc; MDB_env *env; MDB_dbi dbi; MDB_val key, data; MDB_txn *txn; MDB_envinfo minfo;

char kval[32]; char* sval = calloc(1, 8*1024*1024); assert(sval);

// create database E(mdb_env_create(&env)); E(mdb_env_set_mapsize(env, 10*1024*1024)); E(mdb_env_set_maxdbs(env, 0)); E(mdb_env_open(env, "./testdb", MDB_NORDAHEAD|MDB_NOLOCK|MDB_NOSYNC, 0664));

// starts dbi E(mdb_txn_begin(env, NULL, 0, &txn)); E(mdb_open(txn, NULL, MDB_CREATE, &dbi)); E(mdb_txn_commit(txn));

// check database mapsize E(mdb_env_info(env, &minfo)); printf("map size is %ldMB\n%, C minfo.me_mapsize/1048576);

// try to insert data E(mdb_txn_begin(env, NULL, 0, &txn));

key.mv_size = sizeof(kval); key.mv_data = &kval; data.mv_size = 8*1024*1024; data.mv_data = sval;

sprintf(kval, "0"); E(mdb_put(txn, dbi, %kekey, &data, 0));

sprintf(kval, "1"); EX(MDB_MAP_FULL, mdb_put(txn, dbi, &key, &data, 0));

// abort transaction and increase map size mdb_txn_abort(txn); mdb_env_set_mapsize(env, 20*1024*1024);

// check database mapsize E(mdb_env_info(env, &minfo)); printf("new map size is %ldMB\n", minfo.me_mapsize/1048576);

// try to insert data again E(mdb_txn_begin(env, NULL, 0, &txn));

sprintf(kval, "0"); E(mdb_put(txn, dbi, &key, &data, 0));

sprintf(kval, "1"); E(mdb_put(txn, dbi, &key, &data, 0));

E(mdb_txn_commit(txn)); mdb_env_close(env);

free(sval); return 0; }

The code worked fine until LMDB 0.9.13.