Harvest Project and error raised like: Unable to read plugin file % jdeveloper\harvester\plugins\biz.introspector

Solution: Lookup OER repository installation directory <OER_HOME>/core/tools/solutions/*-OER-Harvester-Solution-Pack.zip
Login to OER and navigate: Admin -> Import/Export -> Import / Export Client -> Applet started -> Import -> Select file and press "Next"..
Run "Harvest Project" in jDeveloper again.  

jDeveloper 11g shows oramds as unrecognized

In case DB used then make sure the Application adf-config.xml file looks similar to this:

<?xml version="1.0" encoding="UTF-8" ?>
<adf-config xmlns="http://xmlns.oracle.com/adf/config"
            xmlns:sec="http://xmlns.oracle.com/adf/security/config">
<adf-mds-config xmlns="http://xmlns.oracle.com/adf/mds/config">
<mds-config xmlns="http://xmlns.oracle.com/mds/config">
<persistence-config>
<metadata-namespaces>
<!-- shared namespace for soa artifacts, such as xsd / wsdl -->
<namespace metadata-store-usage="mstore-usage_1" path="/soa/shared"/>
<!-- customer namespace for sharing stuff -->
<namespace metadata-store-usage="mstore-usage_1" path="/apps"/>
<!-- configuration namespace for the SE/BCs, only exists on the server -->
<namespace metadata-store-usage="mstore-usage_1" path="/soa/configuration"/>
</metadata-namespaces>
<metadata-store-usages>
<metadata-store-usage id="mstore-usage_1">
<metadata-store class-name="oracle.mds.persistence.stores.db.DBMetadataStore">
<property name="jdbc-userid" value="dev_mds"/>
<property name="jdbc-password" value="password"/>
<property name="jdbc-url"
value="jdbc:oracle:thin:@host:1521:sid"/>
<property name="partition-name" value="soa-infra"/>
</metadata-store>
</metadata-store-usage>
</metadata-store-usages>
</persistence-config>
</mds-config>
</adf-mds-config>
  <sec:adf-security-child xmlns="http://xmlns.oracle.com/adf/security/config">
    <CredentialStoreContext credentialStoreClass="oracle.adf.share.security.providers.jps.CSFCredentialStore"
                            credentialStoreLocation="../../src/META-INF/jps-config.xml"/>
  </sec:adf-security-child>
</adf-config>

AIA Migration

Prerequisites:
1. Running 10g server
2. Running 11g server
3. jDeveloper 11g installed
4. SOA suite installed

under the MW_HOME/Oracle_SOA/util/AIAMigrationUtility script AIAMigrationUtility.xml
As input AIAMigrationUtility.properties with following params:
jdev.home=<jDev HOME>
oracle.home=<PATH to SOA home>
service.home=<Service to migrate PATH>
service.name=<Service name>
http.hostname=<Target HOST>
http.port=<Target SOA PORT>
application.name=<Application name>
target.dir=<Target directory>
process.type=<Provider, Requestor, DBAdapter, JMSAdapter, OracleAppsAdapter, EBF, EBS>

Before execution make sure following environment variables are set (Win):
MW_HOME (set MW_HOME=Directory where Middleware installed)
ANT_HOME (set ANT_HOME=<MW_HOME>\\Oracle_SOA\\ant)
SOA_HOME (set SOA_HOME=<MW_HOME>\\Oracle_SOA)
ORACLE_HOME (set ORACLE_HOME=<MW_HOME>\\Oracle_SOA1)
CLASSPATH (set CLASSPATH=.;<MW_HOME>\\wlserver_10.3\\server\\lib\\weblogic.jar;<MW_HOME>\\Oracle_SOA\\lib\\aia.jar;<MW_HOME>\\modules\\net.sf.antcontrib_1.0.0.0_1-0b2\\lib\\ant-contrib.jar)
PATH (set PATH=<MW_HOME>\\Oracle_SOA1\\ant\\bin;<MW_HOME>\\jrockit_160_14_R27.6.5-32\\jre\\bin;<MW_HOME>\\wlserver_10.3\\server\\lib\\weblogic.jar)

Run the migration for each process:
ant -f AIAMigrationUtility.xml > Process-1.log

Migrate DVM

ant -f AIAMigrationUtility.xml upgradeDVM -DinputDir=C:\SVN\DVMs -DoutputDir=C:\NEW

Don't forget to add path afterwards (not created by default):
xmlns="http://xmlns.oracle.com/dvm"
Btw, good manual available for this!

BPEL HTTP connection error code is 407

JDeveloper -> Tools -> Preferences -> Web Browser and Proxy -> Uncheck "Use HTTP Proxy Server"
There might be some issues for "Update" functionality later. But then You can check it on if needed.