Sydney Henrard created CAMEL-19081:
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Summary: Start a route with aggregation fails due to NPE in
AggregateProcessor
Key: CAMEL-19081
URL: https://issues.apache.org/jira/browse/CAMEL-19081
Project: Camel
Issue Type: Bug
Affects Versions: 3.20.1
Reporter: Sydney Henrard
In my application I have a route with an aggregation using an aggregation
repository ClusteredJdbcAggregationRepository and completionTimeout. This route
is part of a micro service that can be scaled. From time to time, the micro
service does not start due to a NPE:
{code:java}
Caused by: java.lang.NullPointerException: Cannot invoke
"org.apache.camel.Exchange.getProperty(org.apache.camel.ExchangePropertyKey,
Object, java.lang.Class)" because "exchange" is null at
org.apache.camel.processor.aggregate.AggregateProcessor.restoreTimeoutMapFromAggregationRepository(AggregateProcessor.java:920)
~[camel-core-processor-3.20.1.jar:3.20.1] {code}
In my case the exchange is null because it has already been processed by one of
the micro service instance.
The relevant code is in
[https://github.com/apache/camel/blob/camel-3.20.1/core/camel-core-processor/src/main/java/org/apache/camel/processor/aggregate/AggregateProcessor.java#L920]
{code:java}
for (String key : keys) {
Exchange exchange = aggregationRepository.get(camelContext, key); //
grab the timeout value
long timeout = exchange.getProperty(ExchangePropertyKey.AGGREGATED_TIMEOUT,
0L, long.class);{code}
The null check is missing. It's not a problem when aggregation repository is
not shared among instance like LevelDB, but it is when it's shared like JDBC.
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