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[FLINK-8973] [E2E] HA end-to-end test with StateMachineExample.
Adds an end-to-end test that runs the StateMachineExample on a local cluster with HA enabled. There is a single JM which gets killed and re-created and we check if the new JM picks up the job execution and if at the end the StateMachine has no ALERTs printed. This closes apache#5750.
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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env bash | ||
| ################################################################################ | ||
| # Licensed to the Apache Software Foundation (ASF) under one | ||
| # or more contributor license agreements. See the NOTICE file | ||
| # distributed with this work for additional information | ||
| # regarding copyright ownership. The ASF licenses this file | ||
| # to you under the Apache License, Version 2.0 (the | ||
| # "License"); you may not use this file except in compliance | ||
| # with the License. You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
| ################################################################################ | ||
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| source "$(dirname "$0")"/common.sh | ||
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| TEST_PROGRAM_JAR=$FLINK_DIR/examples/streaming/StateMachineExample.jar\ --error-rate\ 0.0\ --sleep\ 2 | ||
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| JM_WATCHDOG_PID=0 | ||
| TM_WATCHDOG_PID=0 | ||
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| # flag indicating if we have already cleared up things after a test | ||
| CLEARED=0 | ||
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| function stop_cluster_and_watchdog() { | ||
| if [ ${CLEARED} -eq 0 ]; then | ||
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| if ! [ ${JM_WATCHDOG_PID} -eq 0 ]; then | ||
| echo "Killing JM watchdog @ ${JM_WATCHDOG_PID}" | ||
| kill ${JM_WATCHDOG_PID} 2> /dev/null | ||
| wait ${JM_WATCHDOG_PID} 2> /dev/null | ||
| fi | ||
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| if ! [ ${TM_WATCHDOG_PID} -eq 0 ]; then | ||
| echo "Killing TM watchdog @ ${TM_WATCHDOG_PID}" | ||
| kill ${TM_WATCHDOG_PID} 2> /dev/null | ||
| wait ${TM_WATCHDOG_PID} 2> /dev/null | ||
| fi | ||
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| cleanup | ||
| CLEARED=1 | ||
| fi | ||
| } | ||
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| function verify_logs() { | ||
| local OUTPUT=$1 | ||
| local JM_FAILURES=$2 | ||
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| # verify that we have no alerts | ||
| if ! [ `cat ${OUTPUT} | wc -l` -eq 0 ]; then | ||
| echo "FAILURE: Alerts found at the StateMachineExample with 0.0 error rate." | ||
| PASS="" | ||
| fi | ||
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| # checks that all apart from the first JM recover the failed jobgraph. | ||
| if ! [ `grep -r --include '*standalonesession*.log' Recovered SubmittedJobGraph "${FLINK_DIR}/log/" | cut -d ":" -f 1 | uniq | wc -l` -eq ${JM_FAILURES} ]; then | ||
| echo "FAILURE: A JM did not take over." | ||
| PASS="" | ||
| fi | ||
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| # search the logs for JMs that log completed checkpoints | ||
| if ! [ `grep -r --include '*standalonesession*.log' Completed checkpoint "${FLINK_DIR}/log/" | cut -d ":" -f 1 | uniq | wc -l` -eq $((JM_FAILURES + 1)) ]; then | ||
| echo "FAILURE: A JM did not execute the job." | ||
| PASS="" | ||
| fi | ||
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| if [[ ! "$PASS" ]]; then | ||
| echo "One or more tests FAILED." | ||
| exit 1 | ||
| fi | ||
| } | ||
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| function jm_watchdog() { | ||
| local EXPECTED_JMS=$1 | ||
| local IP_PORT=$2 | ||
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| while true; do | ||
| local RUNNING_JMS=`jps | grep 'StandaloneSessionClusterEntrypoint' | wc -l`; | ||
| local MISSING_JMS=$((EXPECTED_JMS-RUNNING_JMS)) | ||
| for (( c=0; c<MISSING_JMS; c++ )); do | ||
| "$FLINK_DIR"/bin/jobmanager.sh start "localhost" ${IP_PORT} | ||
| done | ||
| sleep 5; | ||
| done | ||
| } | ||
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| function kill_jm { | ||
| local JM_PIDS=`jps | grep 'StandaloneSessionClusterEntrypoint' | cut -d " " -f 1` | ||
| local JM_PIDS=(${JM_PIDS[@]}) | ||
| local PID=${JM_PIDS[0]} | ||
| kill -9 ${PID} | ||
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| echo "Killed JM @ ${PID}" | ||
| } | ||
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| function tm_watchdog() { | ||
| local JOB_ID=$1 | ||
| local EXPECTED_TMS=$2 | ||
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| # the number of already seen successful checkpoints | ||
| local SUCCESSFUL_CHCKP=0 | ||
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| while true; do | ||
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| # check how many successful checkpoints we have | ||
| # and kill a TM only if the previous one already had some | ||
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| local CHECKPOINTS=`curl -s "http://localhost:8081/jobs/${JOB_ID}/checkpoints" | cut -d ":" -f 6 | sed 's/,.*//'` | ||
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| if [[ ${CHECKPOINTS} =~ '^[0-9]+$' ]] || [[ ${CHECKPOINTS} == "" ]]; then | ||
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| # this may be the case during leader election. | ||
| # in this case we retry later with a smaller interval | ||
| sleep 5; continue | ||
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| elif [ "${CHECKPOINTS}" -ne "${SUCCESSFUL_CHCKP}" ]; then | ||
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| # we are not only searching for > because when the JM goes down, | ||
| # the job starts with reporting 0 successful checkpoints | ||
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| local RUNNING_TMS=`jps | grep 'TaskManager' | wc -l` | ||
| local TM_PIDS=`jps | grep 'TaskManager' | cut -d " " -f 1` | ||
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| local MISSING_TMS=$((EXPECTED_TMS-RUNNING_TMS)) | ||
| if [ ${MISSING_TMS} -eq 0 ]; then | ||
| # start a new TM only if we have exactly the expected number | ||
| "$FLINK_DIR"/bin/taskmanager.sh start > /dev/null | ||
| fi | ||
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| # kill an existing one | ||
| local TM_PIDS=(${TM_PIDS[@]}) | ||
| local PID=${TM_PIDS[0]} | ||
| kill -9 ${PID} | ||
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| echo "Killed TM @ ${PID}" | ||
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| SUCCESSFUL_CHCKP=${CHECKPOINTS} | ||
| fi | ||
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| sleep 11; | ||
| done | ||
| } | ||
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| function run_ha_test() { | ||
| local PARALLELISM=$1 | ||
| local BACKEND=$2 | ||
| local ASYNC=$3 | ||
| local INCREM=$4 | ||
| local OUTPUT=$5 | ||
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| local JM_KILLS=3 | ||
| local CHECKPOINT_DIR="${TEST_DATA_DIR}/checkpoints/" | ||
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| CLEARED=0 | ||
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| # start the cluster on HA mode | ||
| start_ha_cluster | ||
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| echo "Running on HA mode: parallelism=${PARALLELISM}, backend=${BACKEND}, asyncSnapshots=${ASYNC}, and incremSnapshots=${INCREM}." | ||
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| # submit a job in detached mode and let it run | ||
| local JOB_ID=$($FLINK_DIR/bin/flink run -d -p ${PARALLELISM} \ | ||
| $TEST_PROGRAM_JAR \ | ||
| --backend ${BACKEND} \ | ||
| --checkpoint-dir "file://${CHECKPOINT_DIR}" \ | ||
| --async-checkpoints ${ASYNC} \ | ||
| --incremental-checkpoints ${INCREM} \ | ||
| --output ${OUTPUT} | grep "Job has been submitted with JobID" | sed 's/.* //g') | ||
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| wait_job_running ${JOB_ID} | ||
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| # start the watchdog that keeps the number of JMs stable | ||
| jm_watchdog 1 "8081" & | ||
| JM_WATCHDOG_PID=$! | ||
| echo "Running JM watchdog @ ${JM_WATCHDOG_PID}" | ||
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| sleep 5 | ||
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| # start the watchdog that keeps the number of TMs stable | ||
| tm_watchdog ${JOB_ID} 1 & | ||
| TM_WATCHDOG_PID=$! | ||
| echo "Running TM watchdog @ ${TM_WATCHDOG_PID}" | ||
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| # let the job run for a while to take some checkpoints | ||
| sleep 20 | ||
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| for (( c=0; c<${JM_KILLS}; c++ )); do | ||
| # kill the JM and wait for watchdog to | ||
| # create a new one which will take over | ||
| kill_jm | ||
| sleep 60 | ||
| done | ||
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| verify_logs ${OUTPUT} ${JM_KILLS} | ||
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| # kill the cluster and zookeeper | ||
| stop_cluster_and_watchdog | ||
| } | ||
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| trap stop_cluster_and_watchdog EXIT | ||
| run_ha_test 4 "file" "false" "false" "${TEST_DATA_DIR}/output.txt" | ||
| run_ha_test 4 "rocks" "false" "false" "${TEST_DATA_DIR}/output.txt" | ||
| run_ha_test 4 "file" "true" "false" "${TEST_DATA_DIR}/output.txt" | ||
| run_ha_test 4 "rocks" "false" "true" "${TEST_DATA_DIR}/output.txt" |
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