Elasticsearch primary stuck in initializing status,help?

elasticsearch 2.1.1. i have 147 index, 5shards 2 rep, and 7data note, now data note timeout and soon into cluster。now i have 40 index is in red status,and i see pri is in initializing status.
what does is doing, and how soon fix this status

help,online wait

you can have a try restart es...

Please read About the Elasticsearch category

Especially the paragraph starting with Also be patient.

You probably have too many shards per node here.

thanks.this is online env, and is continuous 7 hour,so i urgent。i will be attention next

The last chapter of the link I provided explains that:

There are no SLAs on responses to questions posted on this forum, if you require help with an SLA on responses you should look into purchasing a subscription package that includes support with an SLA such as those offered by Elastic.