--- tomcat-connectors/native/common/jk_lb_worker.c	(revision 989196)
+++ tomcat-connectors/native/common/jk_lb_worker.c	(working copy)
@@ -65,6 +65,7 @@ 
     JK_LB_METHOD_TEXT_TRAFFIC,
     JK_LB_METHOD_TEXT_BUSYNESS,
     JK_LB_METHOD_TEXT_SESSIONS,
+    JK_LB_METHOD_TEXT_HASH,
     "unknown",
     NULL
 };
@@ -185,6 +186,8 @@ 
         return JK_LB_METHOD_BUSYNESS;
     else if  (*v == 's' || *v == 'S' || *v == '3')
         return JK_LB_METHOD_SESSIONS;
+    else if  (*v == 'h' || *v == 'H' || *v == '4')
+        return JK_LB_METHOD_HASH;
     else
         return JK_LB_METHOD_DEF;
 }
@@ -447,7 +450,7 @@ 
                         ++id_start;
                     if (*id_start == '=' && id_start[1]) {
                         /*
-                         * Session cookie was found, get it's value
+                         * Session cookie was found, get its value
                          */
                         char *id_end;
                         size_t sz;
@@ -755,7 +755,54 @@ 
     return candidate;
 }
 
+unsigned long hash(char *str)
+{
+        unsigned long h = 0, g;
 
+        while ( *str ) {
+                h = ( h << 4 ) + *str++;
+                if (( g = h & 0xF0000000 ))
+                h ^= g >> 24;
+                h &= ~g;
+        }
+
+        return h;
+}
+
+static int find_best_byhash(jk_ws_service_t *s,
+                            lb_worker_t *p,
+                            int *states,
+                            jk_logger_t *l)
+{
+    unsigned long h;
+    unsigned int i;
+    char req[256];
+
+    int candidate = -1;
+    int activation;
+    lb_sub_worker_t wr;
+
+    strncpy(req, s->req_uri, 256);
+    strncpy(req, s->query_string, 256);
+
+    /* hash the request, return appropriate worker */
+    h = hash(req);
+    srand(h); //seed with hash
+    i = rand() % p->num_of_workers;
+
+    wr = p->lb_workers[i];
+    activation = s->extension.activation ?
+                 s->extension.activation[i] :
+                 JK_LB_ACTIVATION_UNSET;
+    if (activation == JK_LB_ACTIVATION_UNSET)
+        activation = wr.activation;
+
+    if (JK_WORKER_USABLE(states[wr.i], activation))
+        candidate = i;
+    return candidate;
+}
+
+
 static int find_best_byvalue(jk_ws_service_t *s,
                              lb_worker_t *p,
                              int *states,
@@ -888,7 +935,14 @@ 
 {
     int rc = -1;
 
-    rc = find_best_byvalue(s, p, states, l);
+    /* Try byhash first, if enabled */
+    if (p->lbmethod == JK_LB_METHOD_HASH)
+      rc = find_best_byhash(s, p, states, l);
+    /* If byhash didn't work (disabled, or error on hashed worker),
+       fall back to default byvalue */
+    if (rc < 0)
+      rc = find_best_byvalue(s, p, states, l);
+
     /* By default use worker route as session route */
     if (rc < 0)
         rc = find_failover_worker(s, p, states, l);
--- tomcat-connectors/native/common/jk_lb_worker.h	(revision 989196)
+++ tomcat-connectors/native/common/jk_lb_worker.h	(working copy)
@@ -44,12 +44,14 @@ 
 #define JK_LB_METHOD_TRAFFIC           (1)
 #define JK_LB_METHOD_BUSYNESS          (2)
 #define JK_LB_METHOD_SESSIONS          (3)
+#define JK_LB_METHOD_HASH              (4)
 #define JK_LB_METHOD_DEF               (JK_LB_METHOD_REQUESTS)
-#define JK_LB_METHOD_MAX               (JK_LB_METHOD_SESSIONS)
+#define JK_LB_METHOD_MAX               (JK_LB_METHOD_HASH)
 #define JK_LB_METHOD_TEXT_REQUESTS     ("Request")
 #define JK_LB_METHOD_TEXT_TRAFFIC      ("Traffic")
 #define JK_LB_METHOD_TEXT_BUSYNESS     ("Busyness")
 #define JK_LB_METHOD_TEXT_SESSIONS     ("Sessions")
+#define JK_LB_METHOD_TEXT_HASH         ("Hash")
 #define JK_LB_METHOD_TEXT_DEF          (JK_LB_METHOD_TEXT_REQUESTS)
 #define JK_LB_LOCK_OPTIMISTIC          (0)
 #define JK_LB_LOCK_PESSIMISTIC         (1)