Sentinel erroring out when connection lost

[daveisfera]

Here's the stacktrace:

  File "/usr/local/lib/python3.6/site-packages/redis/client.py", line 1932, in eval
    return self.execute_command('EVAL', script, numkeys, *keys_and_args)
  File "/usr/local/lib/python3.6/site-packages/redis/client.py", line 572, in execute_command
    connection.send_command(*args) 
  File "/usr/local/lib/python3.6/site-packages/redis/connection.py", line 563, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/usr/local/lib/python3.6/site-packages/redis/connection.py", line 538, in send_packed_command
    self.connect()
  File "/usr/local/lib/python3.6/site-packages/redis/sentinel.py", line 44, in connect
    self.connect_to(self.connection_pool.get_master_address())
  File "/usr/local/lib/python3.6/site-packages/redis/sentinel.py", line 106, in get_master_address
    self.disconnect()
  File "/usr/local/lib/python3.6/site-packages/redis/connection.py", line 920, in disconnect
    for connection in all_conns:   
RuntimeError: Set changed size during iteration

[rolette]

It's one of the various issues from #732. I submitted a PR #784 to fix it, but no joy getting it merged. We've been running with the fix for over a year with no problems.

You'll also want to grab PR #847 to avoid scenarios where you get OSError 99 under load after the master moves.

[github-actions]

This issue is marked stale. It will be closed in 30 days if it is not updated.