I think when Enis reported the issue ( https://issues.apache.org/jira/browse/HBASE-16189), in rolling upgrade regions could move around. So a region created in 2.0 moved to a server with 1.x.
Regards Ram On Wed, Dec 7, 2016 at 1:27 AM, Stack <st...@duboce.net> wrote: > On Tue, Dec 6, 2016 at 10:19 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > > Looking at http://hbase.apache.org/book.html#executing.the.0.96.upgrade > , > > there is step of running "bin/hbase upgrade -check" > > > > How about adding a sample hfile which contains > > CellComparator$MetaCellComparator > > so that the upgrade check can read and verify ? > > > > > > We don't support downgrade. Never have. > St.Ack > > > > > On Tue, Dec 6, 2016 at 8:50 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > > > > The build I used yesterday didn't include HBASE-16189 > > > <https://issues.apache.org/jira/browse/HBASE-16189> > > > > > > Once it is included, the cluster can be downgraded fine. > > > > > > I wonder how users would know that their existing deployment has > > > HBASE-16189 <https://issues.apache.org/jira/browse/HBASE-16189> before > > > upgrading to 2.0 release. > > > > > > On Tue, Dec 6, 2016 at 2:29 AM, ramkrishna vasudevan < > > > ramkrishna.s.vasude...@gmail.com> wrote: > > > > > >> @Ted > > >> Does your version have this fix > > >> https://issues.apache.org/jira/browse/HBASE-16189 > > >> > > >> Regards > > >> Ram > > >> > > >> On Tue, Dec 6, 2016 at 3:56 PM, Ted Yu <yuzhih...@gmail.com> wrote: > > >> > > >> > Is the assumption that hbase:meta would not split ? > > >> > > > >> > In other thread, Francis Liu was proposing supporting splittable > > >> > hbase:meta in 2.0 release. > > >> > > > >> > Cheers > > >> > > > >> > > On Dec 6, 2016, at 2:20 AM, 张铎 <palomino...@gmail.com> wrote: > > >> > > > > >> > > Could this be solved by hosting meta only on master? > > >> > > > > >> > > BTW, MetaCellComparator is introduced in HBASE-10800. > > >> > > > > >> > > Thanks. > > >> > > > > >> > > 2016-12-06 17:44 GMT+08:00 Ted Yu <yuzhih...@gmail.com>: > > >> > > > > >> > >> Hi, > > >> > >> When I restarted a cluster with 1.1 , I found that hbase:meta > > region > > >> > >> (written to by the previously deployed 2.0) couldn't be opened: > > >> > >> > > >> > >> Caused by: java.io.IOException: > > >> > >> org.apache.hadoop.hbase.io.hfile.CorruptHFileException: Problem > > >> reading > > >> > >> HFile Trailer from file hdfs://yz1.xx.com:8020/apps/ > > >> hbase/data/data/ > > >> > >> hbase/meta/1588230740/info/599fc8a37311414e876803312009a986 > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore.openStoreFiles( > > >> HStore.java: > > >> > >> 579) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore.loadStoreFiles( > > >> HStore.java: > > >> > >> 534) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore.<init>( > > HStore.java:275) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HRegion.instantiateHSto > > >> re(HRegion. > > >> > >> java:5150) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion. > > >> java:912) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion. > > >> java:909) > > >> > >> at java.util.concurrent.FutureTask.run(FutureTask. > java:266) > > >> > >> at > > >> > >> java.util.concurrent.Executors$RunnableAdapter.call( > > >> Executors.java:511) > > >> > >> at java.util.concurrent.FutureTask.run(FutureTask. > java:266) > > >> > >> ... 3 more > > >> > >> Caused by: org.apache.hadoop.hbase.io. > hfile.CorruptHFileException: > > >> > Problem > > >> > >> reading HFile Trailer from file hdfs:// > > >> > >> yz1.xx.com:8020/apps/hbase/data/data/hbase/ meta/1588230740/ > > >> > >> info/599fc8a37311414e876803312009a986 > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion( > > >> > HFile.java:483) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.HFile.createReader( > > HFile.java:511) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.StoreFile$Reader. > > >> > >> <init>(StoreFile.java:1128) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.StoreFileInfo. > > >> > >> open(StoreFileInfo.java:267) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFil > > >> e.java:409) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.StoreFile. > > >> > >> createReader(StoreFile.java:517) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore.createStoreFileA > > >> ndReader( > > >> > >> HStore.java:687) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore.access$000( > > >> HStore.java:130) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore$1.call( > > HStore.java:554) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.regionserver.HStore$1.call( > > HStore.java:551) > > >> > >> ... 6 more > > >> > >> Caused by: java.io.IOException: java.lang. > ClassNotFoundException: > > >> > >> org.apache.hadoop.hbase.CellComparator$MetaCellComparator > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.getCompara > > >> torClass( > > >> > >> FixedFileTrailer.java:581) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.FixedFileTrailer. > > deserializeFromPB( > > >> > >> FixedFileTrailer.java:300) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.FixedFileTrailer. > > >> > >> deserialize(FixedFileTrailer.java:242) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.FixedFileTrailer. > readFromStream( > > >> > >> FixedFileTrailer.java:407) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion( > > >> > HFile.java:468) > > >> > >> ... 15 more > > >> > >> Caused by: java.lang.ClassNotFoundException: > > >> > >> org.apache.hadoop.hbase.CellComparator$MetaCellComparator > > >> > >> at java.net.URLClassLoader.findClass(URLClassLoader.java: > > 381) > > >> > >> at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > > >> > >> at sun.misc.Launcher$AppClassLoader.loadClass( > > Launcher.java: > > >> 331) > > >> > >> at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > > >> > >> at java.lang.Class.forName0(Native Method) > > >> > >> at java.lang.Class.forName(Class.java:264) > > >> > >> at > > >> > >> org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.getCompara > > >> torClass( > > >> > >> FixedFileTrailer.java:579) > > >> > >> > > >> > >> When user does rolling upgrade from 1.1 to 2.0, the above may > cause > > >> > problem > > >> > >> if hbase:meta region is updated by server running 2.0 but later > > >> > assigned to > > >> > >> a region server which still runs 1.1 (due to crash of the server > > >> running > > >> > >> 2.0, e.g.) > > >> > >> > > >> > >> I want to get community feedback on the severity of this issue. > > >> > >> > > >> > >> Thanks > > >> > >> > > >> > > > >> > > > > > > > > >
