ennishol opened a new issue, #5330:
URL: https://github.com/apache/camel-quarkus/issues/5330
### Bug description
After migrating to the latest camel-quarkus, I get OOM. The route looks
similar to the following
```
from("file://csv")
.split(body())
.to("seda:line")
from("seda:line")
.setProperty(LINE, body())
.setProperty(ID, simple("${body.id}"))
.setHeader(Exchange.BREADCRUMB_ID, simple("id-${body.id}")))
.... do work ...
.to("seda:another")
from("seda:another")
.setHeader(Exchange.BREADCRUMB_ID, simple("id-${body.id}")))
.... do work ...
```
I captured the histogram
```
num #instances #bytes class name (module)
-------------------------------------------------------
1: 4069129 240857960 [Ljava.lang.Object; ([email protected])
2: 1737404 152891552 java.lang.reflect.Method
([email protected])
3: 5170893 124101432 java.util.ArrayList ([email protected])
4: 3522175 112709600 java.util.HashMap$Node ([email protected])
5: 1713630 95963280
org.apache.camel.component.bean.MethodInfo
6: 1713630 41127120
org.apache.camel.component.bean.MethodInfo$ParameterExpression
7: 65063 38403392 [Ljava.util.HashMap$Node;
([email protected])
8: 1141384 36524288
org.apache.camel.component.bean.ParameterInfo
9: 1713630 36517232 [Lorg.apache.camel.Expression;
10: 1137394 27297456
org.apache.camel.support.builder.ExpressionBuilder$35
11: 1141405 18262600 [Ljava.lang.annotation.Annotation;
([email protected])
12: 378378 17844040 [B ([email protected])
13: 480239 15367648
java.util.concurrent.ConcurrentHashMap$Node ([email protected])
14: 35202 10113096
[Ljava.util.concurrent.ConcurrentHashMap$Node; ([email protected])
15: 227605 9104200 java.util.LinkedHashMap$Entry
([email protected])
16: 372213 8933112 java.lang.String ([email protected])
17: 143920 8059520 java.util.LinkedHashMap
([email protected])
18: 160262 3846288 java.lang.Long ([email protected])
19: 67231 2689240 java.util.EnumMap ([email protected])
20: 33443 2407896 org.apache.camel.support.DefaultExchange
21: 35847 2294208 java.util.concurrent.ConcurrentHashMap
([email protected])
22: 142868 2285888 java.util.LinkedHashMap$LinkedEntrySet
([email protected])
23: 33443 2140352
org.apache.camel.support.ExtendedExchangeExtension
24: 50586 2023440 java.math.BigDecimal ([email protected])
25: 15741 1853016 java.lang.Class ([email protected])
26: 69119 1658856 com.me.MyId
```
1713630 instances of org.apache.camel.Expression looked suspicios to
me, so I replaced all expresions in the route with processors
```
from("seda:line")
.process(e -> {
e.setProperty(LINE, e.getIn().getBody())
e.setProperty(ID, e.getIn().getBody(MyBean.class).getId())
e.getIn().setHeader((Exchange.BREADCRUMB_ID,
e.getIn().getBody(MyBean.class).getId())
})
.... do work ...
```
and this solved the problem. No OOM anymore. Unfortunately, I can't share
the code, but maybe it is worth checking what could be the reason for the large
number of `Expression` instances
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