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HBASE-13446 Add docs warning about missing data for downstream on versions prior to HBASE-13262

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Misty Stanley-Jones 2015-08-10 09:20:08 +10:00
parent aad7fbe6cd
commit 0daae43342
2 changed files with 16 additions and 0 deletions
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8
src/main/asciidoc/_chapters/troubleshooting.adoc
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@ -559,6 +559,14 @@ You can also tail all the logs at the same time, edit files, etc.
For more information on the HBase client, see <<client,client>>.
=== Missed Scan Results Due To Mismatch Of `hbase.client.scanner.max.result.size` Between Client and Server
If either the client or server version is lower than 0.98.11/1.0.0 and the server
has a smaller value for `hbase.client.scanner.max.result.size` than the client, scan
requests that reach the server's `hbase.client.scanner.max.result.size` are likely
to miss data. In particular, 0.98.11 defaults `hbase.client.scanner.max.result.size`
to 2 MB but other versions default to larger values. For this reason, be very careful
using 0.98.11 servers with any other client version.
[[trouble.client.scantimeout]]
=== ScannerTimeoutException or UnknownScannerException

8
src/main/asciidoc/_chapters/upgrading.adoc
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@ -204,6 +204,14 @@ See the release notes on the issue link:https://issues.apache.org/jira/browse/HB
.Distributed Log Replay
<<distributed.log.replay>> is off by default in HBase 1.0.0. Enabling it can make a big difference improving HBase MTTR. Enable this feature if you are doing a clean stop/start when you are upgrading. You cannot rolling upgrade to this feature (caveat if you are running on a version of HBase in excess of HBase 0.98.4 -- see link:https://issues.apache.org/jira/browse/HBASE-12577[HBASE-12577 Disable distributed log replay by default] for more).
.Mismatch Of `hbase.client.scanner.max.result.size` Between Client and Server
If either the client or server version is lower than 0.98.11/1.0.0 and the server
has a smaller value for `hbase.client.scanner.max.result.size` than the client, scan
requests that reach the server's `hbase.client.scanner.max.result.size` are likely
to miss data. In particular, 0.98.11 defaults `hbase.client.scanner.max.result.size`
to 2 MB but other versions default to larger values. For this reason, be very careful
using 0.98.11 servers with any other client version.
[[upgrade1.0.rolling.upgrade]]
==== Rolling upgrade from 0.98.x to HBase 1.0.0
.From 0.96.x to 1.0.0