In order to aid understanding of the problem in more detail, the following steps will demonstrate how to create an erasure-coded profile that will require more shards than our three node cluster can support.

Firstly, like earlier in the chapter, create a new erasure profile but modify the K/M parameters to be k=3 and m=1:

    $ ceph osd erasure-code-profile set broken_profile k=3 m=1
    plugin=jerasure technique=reed_sol_van

Now, create a pool with it:

    $ ceph osd pool create broken_ecpool 128 128 erasure broken_profile

The preceding command gives the following result:

If we look at the output from ceph -s, we will see that the PGs for this new pool are stuck in the creating state:

The output of ceph health detail shows the reason why, and we see the 2147483647 error:

If you encounter this error and it is a result of your erasure profile being larger than your number of hosts or racks, depending on how you have designed your CRUSH map, then the only real solution is to either drop the number of shards or increase the number of hosts.