A bit of further research:
in org.apache.activemq.openwire.OpenWireFormat.marshal there is:
.....
BooleanStream bs = new BooleanStream();
size += dsm.tightMarshal1(this, c, bs);
size += bs.marshalledSize();
if( !sizePrefixDisabled ) {
dataOut.writeInt(size);
}
dataOut.writeByte(type);
bs.marshal(dataOut);
dsm.tightMarshal2(this, c, dataOut, bs);
.....
the problem seems to be that c (second parameter of tightMarshal*) can
change between tightMarshal1 and tightMarshal2. It is a race condition.
What I particulary did was setting a password for a ConnectionInfo to null
in a BrokerFilter#processDispatch. Maybe I shoud synchronize on something
there but I don't know on what.
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