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Mark Owens commented on ACCUMULO-4561: -------------------------------------- A little more info: The monitor.log returns the following warning when the ping command targets a Jetty port: {noformat} 2017-10-11 13:09:25,039 [http.HttpParser] WARN : Illegal character 0x0 in state=START for buffer HeapByteBuffer@3249e354[p=1,l=179,c=8192,r=178]={\x00<<<\x00\x00\xAf\x82!\x01\x15getTabletS...d92138d\x00,\x16\x00\x16\x00\x00\x00>>>\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00...\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00} 2017-10-11 13:09:25,039 [http.HttpParser] WARN : bad HTTP parsed: 400 Illegal character 0x0 for HttpChannelOverHttp@4676385e{r=0,c=false,a=IDLE,uri=null} {noformat} The returned HTTP payload (via wireshark) is: {noformat} 0000 48 54 54 50 2f 31 2e 31 20 34 30 30 20 49 6c 6c HTTP/1.1 400 Ill 0010 65 67 61 6c 20 63 68 61 72 61 63 74 65 72 20 30 egal character 0 0020 78 30 0d 0a 43 6f 6e 74 65 6e 74 2d 4c 65 6e 67 x0..Content-Leng 0030 74 68 3a 20 30 0d 0a 43 6f 6e 6e 65 63 74 69 6f th: 0..Connectio 0040 6e 3a 20 63 6c 6f 73 65 0d 0a 53 65 72 76 65 72 n: close..Server 0050 3a 20 4a 65 74 74 79 28 39 2e 33 2e 32 31 2e 76 : Jetty(9.3.21.v 0060 32 30 31 37 30 39 31 38 29 0d 0a 0d 0a 20170918).... {noformat} > Crash when using ping on a non-existing server > ---------------------------------------------- > > Key: ACCUMULO-4561 > URL: https://issues.apache.org/jira/browse/ACCUMULO-4561 > Project: Accumulo > Issue Type: Bug > Components: shell > Affects Versions: 2.0.0 > Reporter: Luis Tavarez > > While working on ACCUMULO-4558, I tried running > {code}ping -ts localhost:9995{code} (localhost:9995 does not have a a tserver > on my setup.) > And it caused the shell to exit (crashed) and show the following message. > {code}# > # java.lang.OutOfMemoryError: Java heap space > # -XX:OnOutOfMemoryError="kill -9 %p" > # Executing /bin/sh -c "kill -9 25561"... > /home/lmtavar/git/uno/bin/uno: line 44: 25561 Killed > "$ACCUMULO_HOME"/bin/accumulo shell -u "$ACCUMULO_USER" -p > "$ACCUMULO_PASSWORD" "${@:2}" > {code} -- This message was sent by Atlassian JIRA (v6.4.14#64029)