vincentpoon commented on a change in pull request #453: [PHOENIX-5172] Harden
the PQS canary synth test tool with retry mechanism and more logging
URL: https://github.com/apache/phoenix/pull/453#discussion_r263087395
##########
File path:
phoenix-core/src/main/java/org/apache/phoenix/tool/PhoenixCanaryTool.java
##########
@@ -464,11 +364,60 @@ public Void call() {
return 0;
}
+ private static Connection getConnectionWithRetry(String connectionURL,
Properties connProps){
+ Connection connection = null;
+ boolean isSuccess;
+ int currentAttempt = 1;
+ do {
+ try {
+ connection = DriverManager.getConnection(connectionURL,
connProps);
+ LOG.info("Successfully established connection within "
+ +currentAttempt+ "/" + MAX_ATTEMPTS + " attempts");
+ LOG.info("connectionURL :" +connectionURL);
+ LOG.info("connProps :" + connProps);
+ isSuccess = true;
+ } catch (Exception e) {
+ LOG.error("Failed to get connection." +
+ " Exhausted attempts : "+ currentAttempt+ "/" +
MAX_ATTEMPTS);
+ LOG.error("connectionURL :" + connectionURL);
+ LOG.error("connProps :" + connProps);
+ LOG.error("Something went wrong while getting Connection", e);
+ isSuccess = false;
+ sleepBeforeRetry(currentAttempt);
+ currentAttempt++;
+ }
+ } while (isSuccess != true && currentAttempt <= MAX_ATTEMPTS);
+ return connection;
+ }
+
+ private static void sleepBeforeRetry(int attempt) {
+ final int sleepTimesInSeconds= getSleepTime(attempt);
+ try {
+ LOG.info("Sleeping for " + sleepTimesInSeconds +" seconds");
+ TimeUnit.SECONDS.sleep(sleepTimesInSeconds);
+ } catch (InterruptedException e) {
+ LOG.error("Thread interrupted", e);
+ }
+ }
+
+ //fibonacci sequence of sleep interval
+ private static int getSleepTime(int attempt) {
Review comment:
nit: see if we can reuse Retrier code in HBase/Phoenix somewhere
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