AddOn: You can even set a custom http factory for commons-http (which is used by SolrStreamingUpdateServer) at all to influence socket options, example is:
final Protocol http = new Protocol("http", MycustomHttpSocketFactory.getSocketFactory(), 80); and MycustomHttpSocketFactory.getSocketFactory is a factory which does extend org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory and override / implement methods as needed (direct socket access). Call this e.g. in a ServletListener in contextInitialized and you are done. regards Torsten
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