[exo-jcr-commits] exo-jcr SVN: r5721 - jcr/branches/1.15.x/exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/modules/jcr.
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Thu Mar 1 08:36:55 EST 2012
Author: dkuleshov
Date: 2012-03-01 08:36:55 -0500 (Thu, 01 Mar 2012)
New Revision: 5721
Modified:
jcr/branches/1.15.x/exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/modules/jcr/repository-check-controller.xml
Log:
EXOJCR-1761: added chapter with recommendations on ways to fix corrupted JCR
Modified: jcr/branches/1.15.x/exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/modules/jcr/repository-check-controller.xml
===================================================================
--- jcr/branches/1.15.x/exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/modules/jcr/repository-check-controller.xml 2012-03-01 13:26:52 UTC (rev 5720)
+++ jcr/branches/1.15.x/exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/modules/jcr/repository-check-controller.xml 2012-03-01 13:36:55 UTC (rev 5721)
@@ -68,4 +68,486 @@
manually. Warnings found by tool can be a normal situation in some cases
and usually production system will still remain fully functional.</para>
</section>
+
+ <section>
+ <title>Recommendations on how to fix corrupted JCR</title>
+
+ <para>Please, before applying the next recommendations, don't forget to
+ backup your data first. To get the JCR back to normal mode you may require
+ to remove potentially valuable data. It is also recommended to keep the
+ results of queries that check data consistency. This may be needed for the
+ support team in case of deeper restoration process.</para>
+
+ <para>Here are listed the examples of corruptions and ways to eliminate
+ them:<note>
+ <para>It is assumed that queries for single and multi db
+ configurations differs only by JCR_xITEM table name, otherwise queries
+ will be explicitly introduced.</para>
+ </note><note>
+ <para>In some examples you'll be asked to replace some identificator
+ with corresponding value. That basically means that you need to insert
+ values, from each row result of query executed during issue detection
+ stage, to corresponding place. Explicit explanation of what to do will
+ be introduced in case replacing is needed to be fulfilled in other
+ way.</para>
+ </note></para>
+
+ <orderedlist>
+ <listitem>
+ <para><emphasis role="bold">Item has no parent node</emphasis></para>
+
+ <itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting language="sql">select * from JCR_SITEM I where NOT EXISTS(select * from JCR_SITEM P where P.ID = I.PARENT_ID)</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Assign root as parent node to be able to delete later if
+ node is not needed anymore</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>For all query results rows containing items belonging to
+ I_CLASS = 1 (nodes)</para>
+
+ <para>execute next query replacing ${ID} and ${CONTAINER_NAME}
+ by corresponding values:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Single DB</para>
+
+ <programlisting>update JCR_SITEM set PARENT_ID='${CONTAINER_NAME}00exo0jcr0root0uuid0000000000000' where ID = '${ID}'</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Multi DB</para>
+
+ <programlisting>update JCR_MITEM set PARENT_ID='00exo0jcr0root0uuid0000000000000' where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para>For all query results rows containing items belonging to
+ I_CLASS = 2 (property)</para>
+
+ <programlisting>delete from JCR_SREF where PROPERTY_ID = '${ID}'
+delete from JCR_SVALUE where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where PARENT_ID = '${ID}' or ID='${ID}' </programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Node has a single valued properties with
+ no declaration in VALUE table</emphasis></para>
+
+ <itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SITEM P where P.I_CLASS=2 and P.P_MULTIVALUED=0 and NOT EXISTS (select * from JCR_SVALUE V where V.PROPERTY_ID=P.ID)</programlisting>
+
+ <note>
+ <para>P_MULTIVALUED=0 should be replacted by P_MULTIVALUED='f'
+ for PostgreSQL</para>
+ </note>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Simply remove corrupted properties</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix for every row execute next queries replacing ${ID} by
+ corresponding value:</para>
+
+ <programlisting>delete from JCR_SREF where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Node has no primary type
+ property</emphasis></para>
+
+ <itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SITEM N where N.I_CLASS=1 and NOT EXISTS (select * from JCR_SITEM P where P.I_CLASS=2 and P.PARENT_ID=N.ID and P.NAME='[http://www.jcp.org/jcr/1.0]primaryType')
+</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Remove node, all its children, properties, values and
+ reference records</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>First step is to recursivly travers to the bottom of the
+ tree:</para>
+
+ <programlisting>select * from JCR_SITEM where PARENT_ID='${ID}' and I_CLASS=1</programlisting>
+
+ <para>until query results in empty value. You'll receive a
+ tree structure containing a node, its children and
+ properties.</para>
+ </listitem>
+
+ <listitem>
+ <para>Second step is to execute the following steps with tree
+ structure elements in reverse order (from leaves to
+ head)</para>
+
+ <para>Execute query for tree element's ${ID}</para>
+
+ <programlisting>select * from JCR_SITEM where PARENT_ID='${ID}'</programlisting>
+
+ <para>Execute queries for each ${ID} received during mentioned
+ above query execution</para>
+
+ <programlisting>delete from JCR_SREF where PROPERTY_ID = '${ID}'
+delete from JCR_SVALUE where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where PARENT_ID = '${ID}' or ID='${ID}' </programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">All value records have no related property
+ record</emphasis></para>
+
+ <itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SVALUE V where NOT EXISTS(select * from JCR_SITEM P where V.PROPERTY_ID = P.ID and P.I_CLASS=2)</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Remove these unnecessary records from JCR_SVALUE
+ table</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <para>For every row execute next queries replacing ${ID} with
+ corresponding value:</para>
+
+ <programlisting>delete from JCR_SVALUE where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Corrupted VALUE records. Both STORAGE_DESC
+ and DATA fields contain not null value</emphasis><itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SVALUE where (STORAGE_DESC is not null and DATA is not null)</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Set null for STORAGE_DESC field</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <para>For every row execute next queries replacing ${ID} with
+ corresponding value:</para>
+
+ <programlisting>update JCR_SVALUE set STORAGE_DESC = null where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist></para>
+
+ <note>
+ <para>For Sybase DB "DATA is not null" must be replaced by "not DATA
+ like null"</para>
+ </note>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Item is its own
+ parent</emphasis><itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SITEM I where I.ID = I.PARENT_ID and I.NAME <> '__root_parent'</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Assign root as parent node to be able to delete later if
+ node is not needed to use anymore</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>For all query results rows containing items belonging
+ to I_CLASS = 1 (nodes)</para>
+
+ <para>execute next query replacing ${ID} and
+ ${CONTAINER_NAME} with corresponding values:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Single DB</para>
+
+ <programlisting>update JCR_SITEM set PARENT_ID='${CONTAINER_NAME}00exo0jcr0root0uuid0000000000000' where ID = '${ID}'</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Multi DB</para>
+
+ <programlisting>update JCR_MITEM set PARENT_ID='00exo0jcr0root0uuid0000000000000' where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para>For all query results rows containing items belonging
+ to I_CLASS = 2 (property)</para>
+
+ <programlisting>delete from JCR_SREF where PROPERTY_ID = '${ID}'
+delete from JCR_SVALUE where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where PARENT_ID = '${ID}' or ID='${ID}' </programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+ </itemizedlist></para>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Several versions of same
+ item</emphasis><itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SITEM I where EXISTS (select * from JCR_SITEM J WHERE I.CONTAINER_NAME = J.CONTAINER_NAME and I.PARENT_ID = J.PARENT_ID AND I.NAME = J.NAME and I.I_INDEX = J.I_INDEX and I.I_CLASS = J.I_CLASS and I.VERSION != J.VERSION)</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Keep the newest version and remove the others</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Grouping</para>
+
+ <programlisting>select max(VERSION) as MAX_VERSION, PARENT_ID, NAME, CONTAINER_NAME, I_CLASS, I_INDEX from JCR_SITEM WHERE I_CLASS=2 GROUP BY PARENT_ID, CONTAINER_NAME, NAME, I_CLASS, I_INDEX HAVING count(VERSION) > 1</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Execute the following query, replacing ${PARENT_ID}
+ and ${CONTAINER_NAME}, ${NAME}, ${I_CLASS}, ${I_INDEX},
+ ${MAX_VERSION} with corresponding values contained in
+ results of mentioned above query:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Single DB<programlisting>select * from JCR_SITEM where I.CONTAINER_NAME='${CONTAINER_NAME}' and PARENT_ID='${PARENT_ID}' and NAME='${NAME}' and I_CLASS='${I_CLASS}' and I_INDEX='${I_INDEX}' and VERSION < ${MAX_VERSION}</programlisting></para>
+ </listitem>
+
+ <listitem>
+ <para>Multi DB<programlisting>select * from JCR_SITEM where PARENT_ID='${PARENT_ID}' and NAME='${NAME}' and I_CLASS='${I_CLASS}' and I_INDEX='${I_INDEX}' and VERSION < ${MAX_VERSION}</programlisting></para>
+ </listitem>
+ </itemizedlist>
+
+ <para>Execute the following queries, replacing ${ID} with
+ corresponding values of newly obtained results.</para>
+
+ <programlisting>delete from JCR_SREF where PROPERTY_ID = '${ID}'
+delete from JCR_SVALUE where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where ID='${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+ </itemizedlist></para>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Reference properties without reference
+ records</emphasis><itemizedlist>
+ <listitem>
+ <para>To detect an issue you need to execute the following
+ query:</para>
+
+ <programlisting>select * from JCR_SITEM P, JCR_SVALUE V where P.ID = V.PROPERTY_ID and P.P_TYPE=9 and NOT EXISTS (select * from JCR_SREF R where P.ID=R.PROPERTY_ID)</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Remove broken reference properties</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <para>Execute the query replacing ${ID} with corresponding
+ value</para>
+
+ <programlisting>delete from JCR_SVALUE where PROPERTY_ID = '${ID}'
+delete from JCR_SITEM where ID = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist></para>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">Node, considered to be locked in the
+ lockmanager data, is not locked according to the jcr data or the
+ opposite situation</emphasis><itemizedlist>
+ <listitem>
+ <para>To detect an issue you need:</para>
+
+ <para>First get all locked nodes IDs in repository, mentioned in
+ JCR_xITEM table, by executing a query:<programlisting>select distinct PARENT_ID from JCR_SITEM where I_CLASS=2 and (NAME='[http://www.jcp.org/jcr/1.0]lockOwner' or NAME='[http://www.jcp.org/jcr/1.0]lockIsDeep')</programlisting></para>
+
+ <para>Then compare it to nodes IDs from LockManager's
+ table</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>JBC<note>
+ <para>During comparing results be aware that for single
+ DB configurations you need to cut off ID prefix
+ representing workspace name for results obtained from
+ JCR_xITEM table.</para>
+ </note><note>
+ <para>Though usually single lock table is used for the
+ whole repository, it is possible to configure separate
+ db lock tables for each workspace, in this case to
+ obtain information over repository you need to execute
+ queries for each table.</para>
+ </note></para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Non shareable</para>
+
+ <programlisting>select fqn from ${LOCK_TABLE} where parent='/$LOCKS'</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>Shareable</para>
+
+ <para>Replace ${REPOSITORY_NAME} with corresponding
+ value</para>
+
+ <programlisting>select fqn from ${LOCK_TABLE} where parent like '/${REPOSITORY_NAME}%/$LOCKS/' </programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para>ISPN</para>
+
+ <para><note>
+ <para>For ISPN lock tables are defined for each
+ workspace separately, so to obtain information over
+ repository you must execute queries for all lock
+ tables.</para>
+ </note>To get all set of locked node IDs in repository you
+ must execute the following query for each workspace</para>
+
+ <programlisting>select id from ${LOCK_TABLE}</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+
+ <listitem>
+ <para>Fix description:</para>
+
+ <para>Remove inconsistent lock entries and properties. Remove
+ entries in LOCK_TABLE that have no corresponding properties in
+ JCR_xITEM table and remove JCR_xITEM properties that have no
+ corresponding entries in LOCK_TABLE.</para>
+ </listitem>
+
+ <listitem>
+ <para>To fix do the following:</para>
+
+ <para>First remove property values, replace ${ID} with
+ corresponding node ID<programlisting>delete from JCR_SVALUE where PROPERTY_ID in (select ID from JCR_SITEM where PARENT_ID='${ID}' and (NAME = '[http://www.jcp.org/jcr/1.0]lockIsDeep' or NAME = '[http://www.jcp.org/jcr/1.0]lockOwner'))</programlisting>Than
+ remove property items themselves, replace ${ID} with
+ corresponding node ID</para>
+
+ <programlisting>delete from JCR_SITEM where PARENT_ID='${ID}' and (NAME = '[http://www.jcp.org/jcr/1.0]lockIsDeep' or NAME = '[http://www.jcp.org/jcr/1.0]lockOwner')</programlisting>
+
+ <para>Replace ${ID} and ${FQN} with corresponding node ID and
+ FQN</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>JBC</para>
+
+ <programlisting>delete from ${LOCK_TABLE} where fqn = '${FQN}'</programlisting>
+ </listitem>
+
+ <listitem>
+ <para>ISPN</para>
+
+ <para>Execute the following query for each workspace</para>
+
+ <programlisting>delete from ${LOCK_TABLE} where id = '${ID}'</programlisting>
+ </listitem>
+ </itemizedlist>
+ </listitem>
+ </itemizedlist></para>
+ </listitem>
+
+ <listitem>
+ <para><emphasis role="bold">A property's value is stored in the file
+ system, but its content is missing</emphasis></para>
+
+ <para>This cannot be checked via simple SQL queries</para>
+ </listitem>
+ </orderedlist>
+ </section>
</chapter>
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