There are probably many ways to fix the problem.
In my case thous commands helped
# su – hdfs
Find corrupt and missing files on hdfs
# hadoop fsck / | egrep -v ‘^\.+$’ | grep -v eplica
Lets delete them. This is not a problem in case we are going to delete one block – we have replicas in another machines
#hadoop fsck / -delete
And now my hdfs is healthy