hbase表删除后hdfs上数据文件已经没了，但是meta表仍然存在region信息

HBCK一致性 一致性是指Region在meta中的meta表信息、在线Regionserver的Region信息和hdfs的Regioninfo的Region信息的一致。

二. 一致性的检查和修复命令 一致性检查命令

hbase hbck <-details> <表名> 一致性修复

hbase hbck <-fixMeta> ,<-fixAssignments> <表名> 命令详解

-fixAssignments:Try to fix region assignments. Replaces the old -fix

             不同情况，动作不一样，包括下线、关闭和重新上线

-fixMeta：Try to fix meta problems. This assumes HDFS region info is good.

            主要以hdfs为准进行修复，hdfs存在则添加到meta中，不存在删除meta对应region。

三.异常定位和修复 region在meta、regionserver和hdfs三者都有哪些不一致？怎么修复？

可以根据下面的异常清单进行异常定位和修复

UnConsistency

                                    Exception Info

Repair

                                                          Region Is Not In Hbase:Meta

Region信息在meta数据和hdfs都不存在，但是却被部署到Regionserver。

errors.reportError(ERROR_CODE.NOT_IN_META_HDFS, "Region " + descriptiveName + ", key=" + key + ", not on HDFS or in hbase:meta but " + "deployed on " + Joiner.on(", ").join(hbi.deployedOn));

  FixAssignments

Region在meta数据表不存在，也没有被部署到Regionserver，但是数据在hdfs上。

errors.reportError(ERROR_CODE.NOT_IN_META_OR_DEPLOYED, "Region " + descriptiveName + " on HDFS, but not listed in hbase:meta " + "or deployed on any Region server"

FixMeta FixAssignments Region在meta数据表不存在，但是在Regionserver部署，数据在hdfs上。

errors.reportError(ERROR_CODE.NOT_IN_META, "Region " + descriptiveName + " not in META, but deployed on " + Joiner.on(", ").join(hbi.deployedOn));

1.FixMeta

2.FixAssignments

                                                                 Region Is In Hbase:Meta

Region只存在meta中，但在hdfs和rs上都不存在

errors.reportError(ERROR_CODE.NOT_IN_HDFS_OR_DEPLOYED, "Region " + descriptiveName + " found in META, but not in HDFS " + "or deployed on any Region server.")

FixMeta

Region在meta表和Regionserver中存在，但是在hdfs不存在。

errors.reportError(ERROR_CODE.NOT_IN_HDFS, "Region " + descriptiveName + " found in META, but not in HDFS, " + "and deployed on " + Joiner.on(", ").join(hbi.deployedOn));

FixAssignments 2.FixMeta

Region在meta表和hdfs中存在，且Region所在表没有处于disable状态，但是没有部署。

errors.reportError(ERROR_CODE.NOT_DEPLOYED, "Region " + descriptiveName + " not deployed on any Region server.");

FixAssignments

Region处于disabling或disabled

errors.reportError(ERROR_CODE.SHOULD_NOT_BE_DEPLOYED, "Region " + descriptiveName + " should not be deployed according " + "to META, but is deployed on " + Joiner.on(", ").join(hbi.deployedOn));

FixAssignments

Region多分配

errors.reportError(ERROR_CODE.MULTI_DEPLOYED, "Region " + descriptiveName + " is listed in hbase:meta on Region server " + hbi.metaEntry.RegionServer + " but is multiply assigned to Region servers " + Joiner.on(", ").join(hbi.deployedOn));

FixAssignments

Region在meta表的Regionserver信息与实际部署的Regionserver不一致。

errors.reportError(ERROR_CODE.SERVER_DOES_NOT_MATCH_META, "Region " + descriptiveName + " listed in hbase:meta on Region server " + hbi.metaEntry.RegionServer + " but found on Region server " + hbi.deployedOn.get(0));

FixAssignments

父region在meta和hdfs存在，且处于切分状态，但子region的信息在meta信息缺失。

errors.reportError(ERROR_CODE.LINGERING_SPLIT_PARENT, "Region " + descriptiveName + " is a split parent in META, in HDFS, " + "and not deployed on any region server. This could be transient, " + "consider to run the catalog janitor first!");