sunday20111107 opened a new issue #9353:
URL: https://github.com/apache/shardingsphere/issues/9353
## Bug Report
Exception in thread "main" java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:542)
at java.lang.Integer.parseInt(Integer.java:615)
at
org.apache.shardingsphere.sharding.algorithm.sharding.mod.HashModShardingAlgorithm.getShardingCount(HashModShardingAlgorithm.java:52)
at
org.apache.shardingsphere.sharding.algorithm.sharding.mod.HashModShardingAlgorithm.init(HashModShardingAlgorithm.java:47)
at
org.apache.shardingsphere.infra.config.algorithm.ShardingSphereAlgorithmFactory.createAlgorithm(ShardingSphereAlgorithmFactory.java:43)
at
org.apache.shardingsphere.sharding.rule.ShardingRule.lambda$new$0(ShardingRule.java:89)
### Which version of ShardingSphere did you use?
5.0.0-alpha
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-JDBC
### Expected behavior
### Actual behavior
Exception in thread "main" java.lang.NumberFormatException: null
### Reason analyze (If you can)
i use HASH_MOD shardingAlgorithms，YAML config as follows
shardingAlgorithms:
myDatabasePreciseShardingAlgorithm:
type: HASH_MOD
props:
sharding-count: 2
HashModShardingAlgorithm.getShardingCount will call Properties.getProperty,
sharding-count will be load to Properties as Integer，but Properties.getProperty
is only return string，so getProperty(“sharding-count”) will return null.
HashModShardingAlgorithm should reference ModShardingAlgorithm implements
private int getShardingCount() {
Preconditions.checkArgument(props.containsKey(SHARDING_COUNT_KEY),
"Sharding count cannot be null.");
return Integer.parseInt(props.getProperty(SHARDING_COUNT_KEY));
}
public String getProperty(String key) {
Object oval = super.get(key);
String sval = (oval instanceof String) ? (String)oval : null;
return ((sval == null) && (defaults != null)) ?
defaults.getProperty(key) : sval;
}
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
### Example codes for reproduce this issue (such as a github link).
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