Additional fix for BZ 69614

Author: markt-asf

java/org/apache/coyote/http2/Stream.java

@@ -450,6 +450,12 @@ public final void emitHeader(String name, String value) throws HpackException {
                     setIncremental(p.getIncremental());
                 } catch (IOException ioe) {
                     // Not possible with StringReader
+                } catch (IllegalArgumentException iae) {
+                    // Invalid priority header field values should be ignored
+                    if (log.isTraceEnabled()) {
+                        log.trace(sm.getString("http2Parser.processFramePriorityUpdate.invalid", getConnectionId(),
+                                getIdAsString()), iae);
+                    }
                 }
                 break;
             }