fix OOM problem when receive big response of SSE interface from backend - #5148

fix OOM problem when receive big response of SSE interface from backend#5148

chengyouling merged 2 commits into

apache:2.9.xapache/servicecomb-java-chassis:2.9.xfrom

thisAmateur:2.9.xthisAmateur/servicecomb-java-chassis:2.9.xCopy head branch name to clipboard