Gabor Bota created HADOOP-16230:
-----------------------------------
Summary: Corrcet findbug ignores for unjustified issues during
update to guava to 27.0-jre in hadoop-project
Key: HADOOP-16230
URL: https://issues.apache.org/jira/browse/HADOOP-16230
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Gabor Bota
In HADOOP-16220 I’ve added
{code:java}
<Match>
<Class name="org.apache.hadoop.hdfs.qjournal.server.Journal" />
<Method name="persistPaxosData" />
<Bug pattern="NP_NULL_PARAM_DEREF" />
</Match>
{code}
instead of
{code:java}
<Match>
<Class name="org.apache.hadoop.hdfs.qjournal.server.Journal" />
<Method name="getPersistedPaxosData" />
<Bug pattern="NP_NULL_PARAM_DEREF" />
</Match>
{code}
So it should be {{getPersistedPaxosData}} instead of {{persistPaxosData}}.
The following description is correct, but the code was not:
*Null passed for non-null parameter of
com.google.common.base.Preconditions.checkState(boolean, String, Object,
Object, Object) in
org.apache.hadoop.hdfs.qjournal.server.Journal.getPersistedPaxosData(long)*
In {{org/apache/hadoop/hdfs/qjournal/server/Journal.java:1064}} we call
{code:java}
Preconditions.checkState(ret != null &&
ret.getSegmentState().getStartTxId() == segmentTxId,
"Bad persisted data for segment %s: %s ; journal id: %s",
segmentTxId, ret, journalId);
{code}
for this call findbug assumes that {{Argument 4 might be null but must not be
null}}, but Guava 27.0's
{{com.google.common.base.Preconditions#checkState(boolean, java.lang.String,
java.lang.Object, java.lang.Object, java.lang.Object)}} is annotated like the
following:
{code:java}
public static void checkState(
boolean b,
@Nullable String errorMessageTemplate,
@Nullable Object p1,
@Nullable Object p2,
@Nullable Object p3) {
{code}
so we have {{@Nullable}} on each parameter for the method. I don't see this
warning as justified, or need to be fixed.
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