make PollingSubscriberConnection less chatty (#2014)

AntonZarutsky · pongad · commit 9623994f5819 · 2017-04-30T15:05:48.000+10:00
It looks like library try to recover in case of failed pull.
It make sense to change logging level to Warning in order to distinguish from critical errors.
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/spi/v1/PollingSubscriberConnection.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/spi/v1/PollingSubscriberConnection.java
@@ -180,7 +180,7 @@ public void onFailure(Throwable cause) {
               return;
             }
             if (StatusUtil.isRetryable(cause)) {
-              logger.log(Level.SEVERE, "Failed to pull messages (recoverable): ", cause);
+              logger.log(Level.WARNING, "Failed to pull messages (recoverable): ", cause);
               executor.schedule(
                   new Runnable() {
                     @Override

Original file line number	Diff line number	Diff line change
`@@ -180,7 +180,7 @@ public void onFailure(Throwable cause) {`
`180`	`180`	`return;`
`181`	`181`	`}`
`182`	`182`	`if (StatusUtil.isRetryable(cause)) {`
`183`		`- logger.log(Level.SEVERE, "Failed to pull messages (recoverable): ", cause);`
	`183`	`+ logger.log(Level.WARNING, "Failed to pull messages (recoverable): ", cause);`
`184`	`184`	`executor.schedule(`
`185`	`185`	`new Runnable() {`
`186`	`186`	`@Override`