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From Robb Wagoner <r...@pandastrike.com>
Subject MySQL Deadlocks in OfBiz 12.04
Date Wed, 15 Feb 2017 19:03:19 GMT
We are running OfBiz 12.04 and are using MySQL 5.6 as the RDBMS. We are
experiencing database deadlocks and would like to be able to add
MySQL-specific statements to deal with the deadlocks. For example: `SELECT
... FOR UPDATE` on PRIMARY KEYs and/or FOREIGN KEYs in the transactions.

Being new to OfBiz, I've been reviewing the ofbiz-user and ofbiz-dev
archives, OfBiz Wiki, Packt's *Apache OfBiz Cookbook*, and other resources
to learn how we can achieve this.
I see mentions of deadlocks in the archives and in JIRA issues (
https://issues.apache.org/jira/browse/OFBIZ-5065). Nothing conclusive or
directly actionable on managing/dealing with deadlocks is mentioned.

What is the OfBiz-way of dealing with RDBMS deadlocks?


*Deadlocking statements:*
UPDATE SHIPMENT
UPDATE INVENTORY_ITEM
UPDATE GL_ACCOUNT_ORGANIZATION
INSERT INTO ACCTG_TRANS_ENTRY


*entityengine.xml datasource element:*
<datasource name="localmysql"
            helper-class="org.ofbiz.entity.datasource.GenericHelperDAO"
            field-type-name="mysql"
            check-on-start="true"
            add-missing-on-start="true"
            check-pks-on-start="false"
            check-indices-on-start="false"
            use-foreign-keys="true"
            join-style="ansi-no-parenthesis"
            alias-view-columns="false"
            drop-fk-use-foreign-key-keyword="true"
            table-type="InnoDB"
            character-set="utf8"
            collate="utf8_general_ci">
        <read-data reader-name="tenant"/>
        <read-data reader-name="seed"/>
        <read-data reader-name="seed-initial"/>
        <read-data reader-name="demo"/>
        <read-data reader-name="ext"/>
        <inline-jdbc
                jdbc-driver="com.mysql.jdbc.Driver"
                jdbc-uri="jdbc:mysql://
ofbiz-db.example.com/ofbiz?autoReconnect=true"
                jdbc-username="ofbiz"
                jdbc-password="XXXXpasswordXXXX"
                isolation-level="ReadCommitted"
                pool-minsize="2"
                pool-maxsize="250"
                time-between-eviction-runs-millis="600000"/><!-- Please
note that at least one person has experienced a problem with this value
with MySQL
                and had to set it to -1 in order to avoid this issue.
                For more look at http://markmail.org/thread/5sivpykv7xkl66px
and http://commons.apache.org/dbcp/configuration.html-->
        <!-- <jndi-jdbc jndi-server-name="localjndi"
jndi-name="java:/MySqlDataSource" isolation-level="Serializable"/> -->
    </datasource>

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