IO error: No locks available

[tamal adhikary]

I have a very simple code to create a database. It gives me the following error:

Unable to open/create test database './testdb'

IO error: lock ./testdb/LOCK: No locks available

I deleted the 'testdb' directory, renamed the database, still having the same error. The tester code is attached here.

#include <iostream>

#include <sstream>

#include <string>

#include <cassert>

#include "leveldb/db.h"

using namespace std;

int main(int argc, char** argv)

{

    // Set up database connection information and open database

    leveldb::DB* db;

    leveldb::Options options;

    options.create_if_missing = true;

    leveldb::Status status = leveldb::DB::Open(options, "./testdb", &db);

assert(status.ok());

 

    // Iterate over each item in the database and print them

    leveldb::Iterator* it = db->NewIterator(leveldb::ReadOptions());

    

    delete it;

    

    delete db;

}

[tamal adhikary]

I inserted the following lines after assert(status.ok()) which produced the output.

if (!status.ok())

    {

        cerr << "Unable to open/create test database './testdb'" << endl;

        cerr << status.ToString() << endl;

        return -1;

    }

[Joe Steeve]

On Wed, 2020-06-24 at 18:15 -0700, tamal adhikary wrote:
> I have a very simple code to create a database. It gives me the
> following error:
>
> Unable to open/create test database './testdb'
> IO error: lock ./testdb/LOCK: No locks available

What OS are you running it on?

Where is the testdb folder located? Is it a local file-system?

--
Joe Steeve
HiPro IT Solutions Private Limited
http://www.hipro.co.in

[tamal adhikary]

I am running on Ubuntu 16.04. testdb folder is created when the sample code is run in the same directory.