http://git-wip-us.apache.org/repos/asf/hbase/blob/59a61e99/src/main/asciidoc/_chapters/ops_mgt.adoc
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diff --git a/src/main/asciidoc/_chapters/ops_mgt.adoc
b/src/main/asciidoc/_chapters/ops_mgt.adoc
index 585bfc3..f4502cb 100644
--- a/src/main/asciidoc/_chapters/ops_mgt.adoc
+++ b/src/main/asciidoc/_chapters/ops_mgt.adoc
@@ -845,11 +845,39 @@ The LoadTestTool has received many updates in recent
HBase releases, including s
[[ops.pre-upgrade]]
=== Pre-Upgrade validator
Pre-Upgrade validator tool can be used to check the cluster for known
incompatibilities before upgrading from HBase 1 to HBase 2.
-To run all the checks use the `-all` flag.
[source, bash]
----
-$ bin/hbase pre-upgrade -all
+$ bin/hbase pre-upgrade command ...
+----
+
+==== Coprocessor validation
+
+HBase supports co-processors for a long time, but the co-processor API can be
changed between major releases. Co-processor validator tries to determine
+whether the old co-processors are still compatible with the actual HBase
version.
+
+[source, bash]
+----
+$ bin/hbase pre-upgrade validate-cp <jar> -scan|<classes>
+Options:
+ -e Treat warnings as errors.
+ -scan Scan jar for observers.
+----
+
+The first parameter of the tool is the `jar` file which holds the co-processor
implementation. Further parameters can be `-scan` when the tool will
+search the jar file for `Coprocessor` implementations or the `classes` can be
explicitly given.
+
+The tool can report errors and warnings. Errors mean that HBase won't be able
to load the coprocessor, because it is incompatible with the current version
+of HBase. Warnings mean that the co-processors can be loaded, but they won't
work as expected. If `-e` option is given, then the tool will also fail
+for warnings.
+
+Please note that this tool cannot validate every aspect of jar files, it just
does some static checks.
+
+For example:
+
+[source, bash]
+----
+$ bin/hbase pre-upgrade validate-cp my-coprocessor.jar MyMasterObserver
MyRegionObserver
----
==== DataBlockEncoding validation
@@ -858,7 +886,7 @@ To verify that none of the column families are using
incompatible Data Block Enc
[source, bash]
----
-$ bin/hbase pre-upgrade -validateDBE
+$ bin/hbase pre-upgrade validate-dbe
----
This check validates all column families and print out any incompatibilities.
