I met this problem too. It does be caused by some failures of reduce task. Check your web UI for details of failure.
2009/12/27 Doopah Shaf <[email protected]>: > Running jobs sometimes displays progress as follows: > > map 100% reduce 10% > > and then > > map 100% reduce 0% > > What causes this? Is this speculative execution restarting tasks? > > Cheers, > DS > -- [email protected]
