twalthr commented on a change in pull request #17941:
URL: https://github.com/apache/flink/pull/17941#discussion_r759115303



##########
File path: flink-end-to-end-tests/test-scripts/elasticsearch-common.sh
##########
@@ -37,20 +37,10 @@ function setup_elasticsearch {
     local elasticsearchDir=$TEST_DATA_DIR/elasticsearch
     mkdir -p $elasticsearchDir
     echo "Downloading Elasticsearch from $downloadUrl ..."
-    for i in {1..10};
-    do
-        wget "$downloadUrl" -O $TEST_DATA_DIR/elasticsearch.tar.gz
-        if [ $? -eq 0 ]; then
-            echo "Download successful."
-            echo "Extracting..."
-            tar xzf $TEST_DATA_DIR/elasticsearch.tar.gz -C $elasticsearchDir 
--strip-components=1
-            if [ $? -eq 0 ]; then
-                break
-            fi
-        fi
-        echo "Attempt $i failed."
-        sleep 5
-    done
+    retry_times_with_exponential_backoff 10 wget "$downloadUrl" -O 
$TEST_DATA_DIR/elasticsearch.tar.gz
+    echo "Download successful."
+    echo "Extracting..."
+    tar xzf $TEST_DATA_DIR/elasticsearch.tar.gz -C $elasticsearchDir 
--strip-components=1

Review comment:
       we could offer an optional hash argument, if the hash is not correct we 
do the the retry logic as well?




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