Redis Time() command returns an empty result -

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Our Redis Server behaves weird under high load. When calling time () command it will sometimes return an empty result (no exception, only empty result).

Is this an expected behavior when the server or network is overloaded?

Edit: info 

 # server redis_version: 2.8.9 redis_git_sha1: 00000000 redis_git_dirty: 0 redis_build_id: 61e31fc3ea5bf6c redis_mode: standalone OS: Linux 3.5.0-49-generic x86_64 Arc_bits: 64 multiplexing APIs: Apol Jisisi_warjn: 4.6 .3 PROCESS_ID: 31,347 run_id: be2da8cf9660eebd9c70149e0eb6c6e75f424eb2 tcp_port: 6379 uptime_in_seconds: 7,774,141 uptime_in_days: 89 Hz: 10 lru_clock: 5,927,592 config_file: /etc/redis/6379.conf # clients connected_clients: 2471 client_longest_output_list: 0 client_biggest_input_buf : 0 blocked_clients: 64 # memory used_memory: 3162944192 used_memory_human: 2.95g used_mummary_rs: 3483242496 Ughrd_mimori_pik: 16284341712 _mmori_ used Kia_mmori_pik_human: used 15.17 g lua: 797,696 mem_fragmentation_ratio: 1.10 mem_allocator: jemalloc-3.2.0 # persistence Loading: 0 rdb_changes_since_last_save: 812,647 rdb_bgsave_in_progress: 0 rdb_last_save_time: +1415213438 rdb_last_bgsave_status: Well rdb_last_bgsave_time_sec: 22 rdb_current_bgsave_time_sec : -1 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: Well aof_last_write_status: OK # statistics total_connections_received: 84,090,665 total_commands_processed: +15 9 61550471 instantaneous_ops_per_sec: 2032 rejected_connections: 0 sync_full: 0 sync_partial_ok: 0 sync_partial_err: 0 Expired_keys: 37 , 013,331 evicted_keys: 0 keyspace_hits: +3680528 9 22 keyspace_misses: 91,889,146 pubsub_channels: 0 pubsub_patterns: 0 latest_fork_usec: 49438 # replication role: Master Judha_slewsः 0 master_repl_offset: 0 repl_b Acklog_active: 0 repl_backlog_size: 1048576 repl_backlog_first_byte_offset: 0 repl_backlog_histlen: 0 # CPU used_cpu_sys: 61983.57 used_cpu_user : 925632.81 used_cpu_sys_children: 9471.61 used_cpu_user_children: 104999.56 # keypages db 0: keys = 502, end = 187, avg_ttl = 30590 db1: keys = 47290, ends = 0, avg_ttl = 0


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