keith-turner commented on code in PR #2967:
URL: https://github.com/apache/accumulo/pull/2967#discussion_r990196765
##########
core/src/main/java/org/apache/accumulo/core/clientImpl/InstanceOperationsImpl.java:
##########
@@ -119,6 +127,38 @@ public void modifyProperties(final
Consumer<Map<String,String>> mapMutator)
// Send to server
ThriftClientTypes.MANAGER.executeVoid(context, client -> client
.modifySystemProperties(TraceUtil.traceInfo(), context.rpcCreds(),
vProperties));
+
+ return vProperties.getProperties();
+ }
+
+ @Override
+ public Map<String,String> modifyProperties(final
Consumer<Map<String,String>> mapMutator)
+ throws AccumuloException, AccumuloSecurityException,
IllegalArgumentException {
+
+ var log = LoggerFactory.getLogger(InstanceOperationsImpl.class);
+
+ Retry retry =
+ Retry.builder().infiniteRetries().retryAfter(25,
MILLISECONDS).incrementBy(25, MILLISECONDS)
+ .maxWait(30, SECONDS).backOffFactor(1.5).logInterval(3,
MINUTES).createRetry();
+
+ while (true) {
+ try {
+ var props = tryToModifyProperties(mapMutator);
+ retry.logCompletion(log, "Modifying instance properties");
+ return props;
+ } catch (ConcurrentModificationException cme) {
+ try {
+ retry.logRetry(log,
+ "Unable to modify instance properties for because of concurrent
modification");
+ retry.waitForNextAttempt();
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ } finally {
+ retry.useRetry();
Review Comment:
> I did something similar when we were working on external compactions to
retry thift calls -
[RetryableThriftCall](https://github.com/apache/accumulo/blob/main/server/base/src/main/java/org/apache/accumulo/server/compaction/RetryableThriftCall.java)
We need something more general like that so we can reuse retry code. Still
scratching my head over the best way to handle checked exceptions though. Like
what the most concise way to handle one operation that throws checked exception
X and another that throws checked exception Y and these are checked exceptions
that we want to pass up.
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