<font size=2 face="sans-serif">Hi,</font>
<br>
<br><font size=2 face="sans-serif">We have found that some
of the drools classes are not thread safe and hence causing the whole KB
serialisation and deserialisation issues in a highly
concurrent distributed cluster.</font>
<br>
<br><font size=2 face="sans-serif">The below is an example of one of the
instances we have come across where the usage of a non
thread safe collection as instance variables has caused the issue.</font>
<br>
<br><font size=2 face="sans-serif">Could someone look into this and advise:</font>
<br>
<br><font size=2 face="sans-serif">1) If this has been reported /identified
and logged somewhere as an issue already </font>
<br><font size=2 face="sans-serif">2)If there has been any
fix to problems like this in later versions of <b> 5.3.0.Final
?.</b></font>
<br><font size=2 face="sans-serif">3)If not fixed already what is
the process to initiate a fix.</font>
<br>
<br><font size=1 face="Segoe UI">Caused by: java.io.InvalidObjectException:
Illegal mappings count: -1</font>
<br><font size=1 face="Segoe UI"> <b>at
java.util.HashMap.readObject(</b></font><font size=1 color=#0062e1 face="Segoe UI"><b><u>HashMap.java:1130</u></b></font><font size=1 face="Segoe UI"><b>)</b></font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)</font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.DelegatingMethodAccessorImpl.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DelegatingMethodAccessorImpl.java:43</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.lang.reflect.Method.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>Method.java:601</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectStreamClass.invokeReadObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectStreamClass.java:1004</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readSerialData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1891</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1796</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"><b> at
org.jbpm.workflow.core.DroolsAction.readExternal(</b></font><font size=1 color=#0062e1 face="Segoe UI"><b><u>DroolsAction.java:61</u></b></font><font size=1 face="Segoe UI"><b>)</b></font>
<br><font size=1 face="Segoe UI"> at
org.jbpm.workflow.core.impl.DroolsConsequenceAction.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DroolsConsequenceAction.java:49</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readExternalData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1835</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1794</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.rule.JavaDialectRuntimeData.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>JavaDialectRuntimeData.java:182</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readExternalData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1835</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1794</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.util.HashMap.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>HashMap.java:1155</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)</font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.DelegatingMethodAccessorImpl.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DelegatingMethodAccessorImpl.java:43</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.lang.reflect.Method.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>Method.java:601</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectStreamClass.invokeReadObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectStreamClass.java:1004</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readSerialData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1891</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1796</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.rule.DialectRuntimeRegistry.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DialectRuntimeRegistry.java:59</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readExternalData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1835</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1794</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.rule.Package.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>Package.java:197</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readExternalData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1835</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1794</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.util.HashMap.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>HashMap.java:1155</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)</font>
<br><font size=1 face="Segoe UI"> at
sun.reflect.DelegatingMethodAccessorImpl.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DelegatingMethodAccessorImpl.java:43</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.lang.reflect.Method.invoke(</font><font size=1 color=#0062e1 face="Segoe UI"><u>Method.java:601</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectStreamClass.invokeReadObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectStreamClass.java:1004</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readSerialData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1891</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1796</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.common.AbstractRuleBase.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>AbstractRuleBase.java:270</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.reteoo.ReteooRuleBase.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ReteooRuleBase.java:223</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
org.drools.impl.KnowledgeBaseImpl.readExternal(</font><font size=1 color=#0062e1 face="Segoe UI"><u>KnowledgeBaseImpl.java:116</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readExternalData(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1835</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readOrdinaryObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1794</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject0(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:1348</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
java.io.ObjectInputStream.readObject(</font><font size=1 color=#0062e1 face="Segoe UI"><u>ObjectInputStream.java:370</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DSLRuleSet.java:328</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
com.hsbc.gbm.dsl.domain.DSLRuleSet$Serializer.createInstance(</font><font size=1 color=#0062e1 face="Segoe UI"><u>DSLRuleSet.java:1</u></font><font size=1 face="Segoe UI">)</font>
<br><font size=1 face="Segoe UI"> at
com.hsbc.gbm.dsl.domain.AbstractSerializer.deserialize(</font><font size=1 color=#0062e1 face="Segoe UI"><u>AbstractSerializer.java:144</u></font><font size=1 face="Segoe UI">)</font><font size=2 face="sans-serif"><br>
</font>
<br><font size=2 face="sans-serif">Thanks and regards,<br>
</font>
<br><font size=2 color=red face="Arial"><b>Adarsh CHAINI </b></font>
<br><font size=1 face="Arial">SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC
Bank Plc<br>
8 Canada Square, London E14 5HQ, UK</font>
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</font>
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<tr>
<td width=12%>
<td width=87%>
<tr>
<td><font size=1 color=#4f4f4f face="Arial">Phone</font>
<td><font size=1 color=#4f4f4f face="Arial">Int: (0)79914720 Ext: +44 (0)20
79914720</font>
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<td><font size=1 color=#4f4f4f face="Arial">Mobile</font>
<td><font size=1 color=#4f4f4f face="Arial">+44(0)7595530105</font>
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<td><a href=mailto:adarsh.chaini@hsbcib.com><font size=1 color=red face="Arial"><u>adarsh.chaini@hsbcib.com</u></font></a></table>
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