[email protected] 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.
>
>
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
