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step3: if there is error after retry, will throw exception which does not execute delete WAL etc.. and set onlyread mode to true

step4:trigger only read mode recovery,  will close all tsfile. as the same, default retry 3 times,  interval 10 minmin（The configuration file can be modified），  there is long time...

step5: if close all tsfile success,  will set only-read to false.