f7744b72_e__8_0_24____The_AJP_Connector__Description
[Attribute] packetSize [Description] 
This attribute sets the maximum AJP packet size in Bytes. The maximum value is 65536. It should be the same as the max_packet_size directive configured for mod_jk. Normally it is not necessary to change the maximum packet size. Problems with the default value have been reported when sending certificates or certificate chains. The default value is 8192. If set to less than 8192 then the setting will ignored and the default value of 8192 used.
Apache Tomcat 8 Configuration Reference (8.0.24) - The AJP Connector