On 4 Debian 8 Jessie servers, I have PostgreSQL 9.4.3 master + 3 slaves. After substantial data changes on master, slave logs showed this error:
LOG: started streaming WAL from primary at 182/0 on timeline 1
FATAL: could not receive data from WAL stream: ERROR: requested WAL segment 000000010000018200000000 has already been removed
What steps do i need to restore/rebuild the slaves?