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From xl l <yours...@gmail.com>
Subject Re: kylin sql query with Weird error
Date Thu, 16 Feb 2017 12:30:18 GMT
HI, I am sure hbase is ok.
而且只有这个sql抛异常,且能稳定复现。 sql稍微改一下,就正常。

从异常日志看, 首先抛出异常的是
Caused by: java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
at
org.apache.kylin.storage.hbase.cube.v2.HBaseReadonlyStore$1$1.next(HBaseReadonlyStore.java:131)

对应于 代码:

Pair<byte[], byte[]> hbaseColumn = hbaseColumns.get(i);
Cell cell = findCell(oneRow, hbaseColumn.getFirst(), hbaseColumn.getSecond());
Preconditions.checkNotNull(cell);

cell 啥时候 会为空?





2017-02-16 17:47 GMT+08:00 ShaoFeng Shi <shaofengshi@apache.org>:

> "java.net.SocketTimeoutException", did you check HBase's healthy status?
> Are all regions of the table "KYLIN_F2H6NPOLR7" online?
>
> 2017-02-16 16:10 GMT+08:00 xl l <yourslxl@gmail.com>:
>
> > see  :
> >
> > http://note.youdao.com/noteshare?id=df34c64dcf3cf801a9c085be0c3f5f
> 21&sub=
> > 7BB3043221BA44E4BAF5760339280480
> >
> >
> > kylin 1.6 问题记录:
> > 版本:apache-kylin-1.6.0-hbase1.x-bin
> >
> >
> > select
> > cast(SUM(pv) as double) as pv,
> > cast( count(distinct user_id) as double) as user_id
> > from olap.olap_log_accs_page_di
> > inner join DIM.DIM_LOG_USER_LOCATION on
> > DIM.DIM_LOG_USER_LOCATION.user_city_code=olap.olap_log_
> > accs_page_di.location
> >
> > inner join DIM.DIM_PUBLIC_DATE_INFO on
> > DIM.DIM_PUBLIC_DATE_INFO."DATE"=olap.olap_log_accs_page_di."DATE"
> > where
> > DIM.DIM_PUBLIC_DATE_INFO."DATE" >=20170117
> > and DIM.DIM_PUBLIC_DATE_INFO."DATE" <=20170215
> > and DIM.DIM_LOG_USER_LOCATION.user_region_name in ('华东')
> > group by
> > DIM.DIM_LOG_USER_LOCATION.user_country_name,DIM.DIM_LOG_
> > USER_LOCATION.user_province_name,DIM.DIM_LOG_USER_
> > LOCATION.user_region_name
> >
> > order by DIM.DIM_LOG_USER_LOCATION.user_province_name ASC
> >
> > 上面这个sql执行OK,符合预期。
> > 但是 如果 仅仅把 in ('华东') 改成 in ('华东','华南') 则 sql执行就会报错。
> >
> >
> > 错误信息如下所示:
> >
> >
> > 查看 kylin.log日志, 详细的异常信息 :
> > http://note.youdao.com/noteshare?id=a1c257599774c4bccb0c6763923359
> d5&sub=
> > 11C6AA36AC894EDD9006DDAE17B16747
> > 2017-02-16 15:32:51,080 WARN [kylin-coproc--pool3-t5578]
> > ipc.CoprocessorRpcChannel:58 : Call failed on IOException
> > java.net.SocketTimeoutException: callTimeout=60000, callDuration=114625:
> > row ' ' on table 'KYLIN_F2H6NPOLR7' at
> > region=KYLIN_F2H6NPOLR7,,1487168742102.433e266be82448c5380610e9e77046
> 58.,
> > hostname=jx-db-hbase03.22lll.com,16020,1480406440673, seqNum=2
> > at
> > org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(
> > RpcRetryingCaller.java:159)
> > at
> > org.apache.hadoop.hbase.ipc.RegionCoprocessorRpcChannel.callExecService(
> > RegionCoprocessorRpcChannel.java:95)
> > at
> > org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel.callMethod(
> > CoprocessorRpcChannel.java:56)
> > at
> > org.apache.kylin.storage.hbase.cube.v2.coprocessor.endpoint.generated.
> > CubeVisitProtos$CubeVisitService$Stub.visitCube(CubeVisitProtos.
> java:4178)
> >
> > Caused by: java.lang.NullPointerException
> > at com.google.common.base.Preconditions.checkNotNull(
> > Preconditions.java:191)
> > at
> > org.apache.kylin.storage.hbase.cube.v2.HBaseReadonlyStore$1$1.next(
> > HBaseReadonlyStore.java:131)
> >
> >
> >
> > 根据kylin.log 异常,我的的判断定位,kylin源码中:HBaseReadonlyStore
> >
> > 麻烦帮忙排查,顺便咨询一下,这个源码中 cell啥情况下会为空?
> >
> >
> >
> >
> > 附上该sql其他情况下:
> > 如果 把sql 中 in ('华东') 改成 in ('华东','华南') 后 ,同时 select
sum,count(distinct)
> 两个指标
> > 只出现一个 指标, 也不会报错。
> >
> > 补充说明:在kylin 1.5.4.1 版本,该诡异现象 也存在。
> >
> >
> > 附上 cube_desc 详细信息:
> >
> > { "uuid": "f30d538b-5345-4f77-b8e3-b20ebae8cb8e", "last_modified":
> > 1487147245924, "version": "1.6.0", "name":
> > "olap_log_accs_page_di_cube_0215", "model_name":
> > "olap_log_accs_page_di_cube_0215", "description":
> > "olap_log_accs_page_di_cube_0215", "null_string": null, "dimensions": [
> {
> > "name": "YEAR", "table": "DIM.DIM_PUBLIC_DATE_INFO", "column": "YEAR",
> > "derived": null }, { "name": "QUARTER", "table":
> > "DIM.DIM_PUBLIC_DATE_INFO", "column": "QUARTER_CN", "derived": null }, {
> > "name": "MONTH", "table": "DIM.DIM_PUBLIC_DATE_INFO", "column":
> "MONTH_CN",
> > "derived": null }, { "name": "DATE", "table": "DIM.DIM_PUBLIC_DATE_INFO",
> > "column": "DATE", "derived": null }, { "name": "PROVINCE", "table":
> > "DIM.DIM_PUBLIC_CITY_INFO", "column": "PROVINCE_NAME", "derived": null
> }, {
> > "name": "CITY", "table": "DIM.DIM_PUBLIC_CITY_INFO", "column":
> "CITY_NAME",
> > "derived": null }, { "name": "USER_COUNTRY", "table":
> > "DIM.DIM_LOG_USER_LOCATION", "column": "USER_COUNTRY_NAME", "derived":
> null
> > }, { "name": "USER_REGION", "table": "DIM.DIM_LOG_USER_LOCATION",
> "column":
> > "USER_REGION_NAME", "derived": null }, { "name": "USER_PROVINCE",
> "table":
> > "DIM.DIM_LOG_USER_LOCATION", "column": "USER_PROVINCE_NAME", "derived":
> > null }, { "name": "USER_CITY", "table": "DIM.DIM_LOG_USER_LOCATION",
> > "column": "USER_CITY_NAME", "derived": null }, { "name": "USER_TYPE",
> > "table": "DIM.DIM_LOG_USER_TYPE", "column": "TYPE_NAME", "derived": null
> },
> > { "name": "IS_LOGIN", "table": "DIM.DIM_LOG_IS_LOGIN", "column":
> > "LOGIN_NAME", "derived": null }, { "name": "IS_REGISTER", "table":
> > "DIM.DIM_LOG_IS_REGISTER", "column": "REGISTER_NAME", "derived": null },
> {
> > "name": "BROWSER", "table": "DIM.DIM_LOG_BROWSER", "column":
> > "BROWSER_NAME", "derived": null }, { "name": "APP_VERSION", "table":
> > "DIM.DIM_LOG_APP_VERSION", "column": "VERSION_NAME", "derived": null } ],
> > "measures": [ { "name": "_COUNT_", "function": { "expression": "COUNT",
> > "parameter": { "type": "constant", "value": "1", "next_parameter": null
> },
> > "returntype": "bigint" }, "dependent_measure_ref": null }, { "name":
> "PV",
> > "function": { "expression": "SUM", "parameter": { "type": "column",
> > "value": "PV", "next_parameter": null }, "returntype": "bigint" },
> > "dependent_measure_ref": null }, { "name": "UV", "function": {
> > "expression": "COUNT_DISTINCT", "parameter": { "type": "column", "value":
> > "USER_ID", "next_parameter": null }, "returntype": "bitmap" },
> > "dependent_measure_ref": null }, { "name": "OUT_SESSION", "function": {
> > "expression": "SUM", "parameter": { "type": "column", "value":
> > "IS_OUT_SESSION", "next_parameter": null }, "returntype": "bigint" },
> > "dependent_measure_ref": null } ], "dictionaries": [], "rowkey": {
> > "rowkey_columns": [ { "column": "YEAR", "encoding": "dict", "isShardBy":
> > false }, { "column": "QUARTER_CN", "encoding": "dict", "isShardBy": false
> > }, { "column": "MONTH_CN", "encoding": "dict", "isShardBy": false }, {
> > "column": "DATE", "encoding": "dict", "isShardBy": false }, { "column":
> > "PROVINCE_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "CITY_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "USER_COUNTRY_NAME", "encoding": "dict", "isShardBy": false }, {
> "column":
> > "USER_REGION_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "USER_PROVINCE_NAME", "encoding": "dict", "isShardBy": false }, {
> "column":
> > "USER_CITY_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "TYPE_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "LOGIN_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "REGISTER_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "BROWSER_NAME", "encoding": "dict", "isShardBy": false }, { "column":
> > "VERSION_NAME", "encoding": "dict", "isShardBy": false } ] },
> > "hbase_mapping": { "column_family": [ { "name": "F1", "columns": [ {
> > "qualifier": "M", "measure_refs": [ "_COUNT_", "PV", "OUT_SESSION" ] } ]
> },
> > { "name": "F2", "columns": [ { "qualifier": "M", "measure_refs": [ "UV"
> ] }
> > ] } ] }, "aggregation_groups": [ { "includes": [ "YEAR", "QUARTER_CN",
> > "MONTH_CN", "DATE", "PROVINCE_NAME", "CITY_NAME", "USER_COUNTRY_NAME",
> > "USER_REGION_NAME", "USER_PROVINCE_NAME", "USER_CITY_NAME", "TYPE_NAME",
> > "LOGIN_NAME", "REGISTER_NAME", "BROWSER_NAME", "VERSION_NAME" ],
> > "select_rule": { "hierarchy_dims": [ [ "YEAR", "QUARTER_CN", "MONTH_CN",
> > "DATE" ], [ "PROVINCE_NAME", "CITY_NAME" ], [ "USER_COUNTRY_NAME",
> > "USER_REGION_NAME", "USER_PROVINCE_NAME", "USER_CITY_NAME" ] ],
> > "mandatory_dims": [], "joint_dims": [] } } ], "signature":
> > "odaKh4hY+Mb4uRggEJJanQ==", "notify_list": [], "status_need_notify": [
> > "ERROR", "DISCARDED", "SUCCEED" ], "partition_date_start": 1485907200000,
> > "partition_date_end": 3153600000000, "auto_merge_time_ranges": [
> 604800000,
> > 2419200000 ], "retention_range": 0, "engine_type": 2, "storage_type": 2,
> > "override_kylin_properties": { "kylin.cube.aggrgroup.max.combination":
> > "16384" } }
> >
> >
> >
> >
> >
> >
> > --
> > 祝身体健康,万事如意 ^_^
> >
>
>
>
> --
> Best regards,
>
> Shaofeng Shi 史少锋
>



-- 
祝身体健康,万事如意 ^_^

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