Background saving is not properly working.
홍국표
When slave redis connect to master redis, it doesn’t work with below log message:
[2867] 22 Feb 19:40:52.393 # Server started, Redis version 2.8.9
[2867] 22 Feb 19:40:52.398 * DB loaded from disk: 0.005 seconds
[2867] 22 Feb 19:40:52.398 * The server is now ready to accept connections on port 6379
[2867] 22 Feb 19:41:14.348 * Slave asks for synchronization
[2867] 22 Feb 19:41:14.348 * Full resync requested by slave.
[2867] 22 Feb 19:41:14.348 * Starting BGSAVE for SYNC
[2867] 22 Feb 19:41:14.349 * Background saving started by pid 2901
[2901] 22 Feb 19:41:14.430 * DB saved on disk
[2901] 22 Feb 19:41:14.431 * RDB: 6 MB of memory used by copy-on-write
You can also check slave redis log message as below:
[2492] 23 Feb 09:41:14.344 # Server started, Redis version 2.8.9
[2492] 23 Feb 09:41:14.344 * The server is now ready to accept connections on port 6379
[2492] 23 Feb 09:41:14.347 * Connecting to MASTER 172.16.40.130:6379
[2492] 23 Feb 09:41:14.347 * MASTER <-> SLAVE sync started
[2492] 23 Feb 09:41:14.347 * Non blocking connect for SYNC fired the event.
[2492] 23 Feb 09:41:14.348 * Master replied to PING, replication can continue...
[2492] 23 Feb 09:41:14.348 * Partial resynchronization not possible (no cached master)
[2492] 23 Feb 09:41:14.348 * Full resync from master: 529e2a6a7e9352221591ab87153a544097f775c0:1
When I check ps, it seems like ‘pid 2901’ which is marked on master slave is not created.
I run redis using fork() on my own program. (not daemon mode)
I’m wondering whether the fork() could be the matter or not.
Below is when I use info commend connecting to redis-client.
# Server
redis_version:2.8.9
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:7bdcda25aec741ed
redis_mode:standalone
os:Linux 3.10.0-123.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
gcc_version:4.8.2
process_id:2867
run_id:529e2a6a7e9352221591ab87153a544097f775c0
tcp_port:6379
uptime_in_seconds:6948
uptime_in_days:0
hz:10
lru_clock:15372856
config_file:/home/devel/tybis/conf/redis.conf
# Clients
connected_clients:6
client_longest_output_list:5
client_biggest_input_buf:0
blocked_clients:0
# Memory
used_memory:1807352
used_memory_human:1.72M
used_memory_rss:10084352
used_memory_peak:1807352
used_memory_peak_human:1.72M
used_memory_lua:33792
mem_fragmentation_ratio:5.58
mem_allocator:jemalloc-3.2.0
# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:1
rdb_last_save_time:1424652052
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:6926
aof_enabled:0
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
# Stats
total_connections_received:7
total_commands_processed:6924
instantaneous_ops_per_sec:1
rejected_connections:0
sync_full:1
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:722
# Replication
role:master
connected_slaves:1
slave0:ip=172.16.40.131,port=6379,state=wait_bgsave,offset=0,lag=0
master_repl_offset:96797
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:96796
# CPU
used_cpu_sys:3.73
used_cpu_user:1.38
used_cpu_sys_children:0.00
used_cpu_user_children:0.00
# Keyspace
Could you please kindly check and reply me ASAP.
If you need any other information for checking the issue, please contact me any time.
Thank you,
Jan-Erik Rediger
the given log shows no wrong doing. Is this the full log?
Can you include the INFO output of the slave?
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