close index channel failed/too many tablet versions

问题描述:
导入频率太快,compaction没能及时合并导致版本数过多,默认版本数1000

1.增大单次导入数据量,降低频率
2.调整compaction策略,加快合并(调整完需要观察内存和io)be.conf
cumulative_compaction_num_threads_per_disk = 4
base_compaction_num_threads_per_disk = 2
cumulative_compaction_check_interval_seconds = 2