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diff --git a/modules/proxy/mod_proxy_ajp.c b/modules/proxy/mod_proxy_ajp.c
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index e2992fc..46d42bc 100644
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--- a/modules/proxy/mod_proxy_ajp.c
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+++ b/modules/proxy/mod_proxy_ajp.c
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@@ -246,9 +246,18 @@ static int ap_proxy_ajp_request(apr_pool_t *p, request_rec *r,
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     /* read the first block of data */
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     input_brigade = apr_brigade_create(p, r->connection->bucket_alloc);
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     tenc = apr_table_get(r->headers_in, "Transfer-Encoding");
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-    if (tenc && (ap_cstr_casecmp(tenc, "chunked") == 0)) {
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-        /* The AJP protocol does not want body data yet */
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-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00870) "request is chunked");
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+    if (tenc) {
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+        if (ap_cstr_casecmp(tenc, "chunked") == 0) {
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+            /* The AJP protocol does not want body data yet */
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+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00870)
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+                          "request is chunked");
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+        }
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+        else {
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+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10396)
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+                          "%s Transfer-Encoding is not supported",
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+                          tenc);
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+            return HTTP_INTERNAL_SERVER_ERROR;
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+        }
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     } else {
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         /* Get client provided Content-Length header */
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         content_length = get_content_length(r);