[ 
https://issues.apache.org/jira/browse/HTRACE-368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15273125#comment-15273125
 ] 

Lewis John McGibbney commented on HTRACE-368:
---------------------------------------------

bq. Can you be clearer about what error you are seeing?
{code}
Generating /usr/local/incubator-htrace/target/site/apidocs/help-doc.html...
14 errors
100 warnings
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Apache HTrace ...................................... FAILURE [ 10.032 s]
[INFO] htrace-c ........................................... SKIPPED
[INFO] htrace-core4 ....................................... SKIPPED
[INFO] htrace-webapp ...................................... SKIPPED
[INFO] htrace-zipkin ...................................... SKIPPED
[INFO] htrace-hbase ....................................... SKIPPED
[INFO] htrace-flume ....................................... SKIPPED
[INFO] htrace-htraced ..................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 10.487 s
[INFO] Finished at: 2016-05-05T14:13:24-07:00
[INFO] Final Memory: 29M/1472M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-javadoc-plugin:2.8.1:aggregate (default-cli) on 
project htrace: An error has occurred in JavaDocs report generation:
[ERROR] Exit code: 1 - 
/usr/local/incubator-htrace/htrace-core4/src/main/java/org/apache/htrace/core/Span.java:94:
 warning: no @param for description
[ERROR] Span child(String description);
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:185:
 warning: no @return
[ERROR] public boolean isSetTimestamp() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:207:
 warning: no @return
[ERROR] public boolean isSetValue() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:231:
 warning: no @return
[ERROR] public boolean isSetHost() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:147:
 warning: no @param for other
[ERROR] public Annotation(Annotation other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:67:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:67:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:84:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:84:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:93:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Annotation.java:93:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/AnnotationType.java:40:
 warning: no @param for value
[ERROR] public static AnnotationType findByValue(int value) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:203:
 warning: no @return
[ERROR] public boolean isSetKey() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:237:
 warning: no @return
[ERROR] public boolean isSetValue() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:251:
 warning: no @return
[ERROR] public AnnotationType getAnnotation_type() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:259:
 warning: no @param for annotation_type
[ERROR] public BinaryAnnotation setAnnotation_type(AnnotationType 
annotation_type) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:259:
 warning: no @return
[ERROR] public BinaryAnnotation setAnnotation_type(AnnotationType 
annotation_type) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:269:
 warning: no @return
[ERROR] public boolean isSetAnnotation_type() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:293:
 warning: no @return
[ERROR] public boolean isSetHost() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:161:
 warning: no @param for other
[ERROR] public BinaryAnnotation(BinaryAnnotation other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:78:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:78:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:97:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:97:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:106:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/BinaryAnnotation.java:106:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:187:
 warning: no @return
[ERROR] public boolean isSetIpv4() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:210:
 warning: no @return
[ERROR] public boolean isSetPort() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:232:
 warning: no @return
[ERROR] public boolean isSetService_name() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:150:
 warning: no @param for other
[ERROR] public Endpoint(Endpoint other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:67:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:67:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:84:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:84:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:93:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Endpoint.java:93:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:169:
 warning: no @return
[ERROR] public boolean isSetCategory() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:193:
 warning: no @return
[ERROR] public boolean isSetMessage() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:136:
 warning: no @param for other
[ERROR] public LogEntry(LogEntry other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:64:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:64:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:79:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:79:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:88:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/LogEntry.java:88:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/ResultCode.java:35:
 warning: no @param for value
[ERROR] public static ResultCode findByValue(int value) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:322:
 warning: no @return
[ERROR] public boolean isSetMessages() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:274:
 warning: no @param for other
[ERROR] public Log_args(Log_args other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:207:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:207:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:220:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:220:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:229:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:229:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:708:
 warning: no @return
[ERROR] public ResultCode getSuccess() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:716:
 warning: no @param for success
[ERROR] public Log_result setSuccess(ResultCode success) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:716:
 warning: no @return
[ERROR] public Log_result setSuccess(ResultCode success) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:726:
 warning: no @return
[ERROR] public boolean isSetSuccess() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:689:
 warning: no @param for other
[ERROR] public Log_result(Log_result other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:623:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:623:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:636:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:636:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:645:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Scribe.java:645:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:248:
 warning: no @return
[ERROR] public boolean isSetTrace_id() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:270:
 warning: no @return
[ERROR] public boolean isSetName() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:295:
 warning: no @return
[ERROR] public boolean isSetId() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:318:
 warning: no @return
[ERROR] public boolean isSetParent_id() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:355:
 warning: no @return
[ERROR] public boolean isSetAnnotations() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:394:
 warning: no @return
[ERROR] public boolean isSetBinary_annotations() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:419:
 warning: no @return
[ERROR] public boolean isSetDebug() {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:189:
 warning: no @param for other
[ERROR] public Span(Span other) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:79:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:79:
 warning: no @return
[ERROR] public static _Fields findByThriftId(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:104:
 warning: no @param for fieldId
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:104:
 warning: no @return
[ERROR] public static _Fields findByThriftIdOrThrow(int fieldId) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:113:
 warning: no @param for name
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/com/twitter/zipkin/gen/Span.java:113:
 warning: no @return
[ERROR] public static _Fields findByName(String name) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/impl/HBaseSpanReceiver.java:304:
 error: self-closing element not allowed
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/impl/HBaseSpanReceiver.java:307:
 warning: no description for @throws
[ERROR] * @throws IOException
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/impl/HBaseSpanReceiver.java:342:
 warning: no description for @throws
[ERROR] * @throws IOException
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/impl/HBaseSpanReceiver.java:344:
 warning: no @param for args
[ERROR] public static void main(String[] args) throws Exception {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ScribeTransport.java:106:
 error: bad use of '>'
[ERROR] *  | HTrace Span|-->|Zipkin Span |-->| (LogEntry) | ===========> | 
Zipkin Collector|
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ScribeTransport.java:106:
 error: bad use of '>'
[ERROR] *  | HTrace Span|-->|Zipkin Span |-->| (LogEntry) | ===========> | 
Zipkin Collector|
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ScribeTransport.java:106:
 error: bad use of '>'
[ERROR] *  | HTrace Span|-->|Zipkin Span |-->| (LogEntry) | ===========> | 
Zipkin Collector|
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ScribeTransport.java:110:
 warning: no description for @throws
[ERROR] * @throws IOException
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ZipkinSpanReceiver.java:341:
 error: self-closing element not allowed
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ZipkinSpanReceiver.java:344:
 warning: no description for @throws
[ERROR] * @throws IOException
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/impl/ZipkinSpanReceiver.java:54:
 error: self-closing element not allowed
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:106:
 warning: no @param for hTraceSpan
[ERROR] public Span convert(org.apache.htrace.core.Span hTraceSpan) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:106:
 warning: no @return
[ERROR] public Span convert(org.apache.htrace.core.Span hTraceSpan) {
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:39:
 error: self-closing element not allowed
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:42:
 error: unknown tag: col
[ERROR] * <col width="50%"/> <col width="50%"/> <thead>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:42:
 error: unknown tag: col
[ERROR] * <col width="50%"/> <col width="50%"/> <thead>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:47:
 error: tag not allowed here: <thead>
[ERROR] * <thead> <tbody>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:47:
 error: tag not allowed here: <tbody>
[ERROR] * <thead> <tbody>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:42:
 error: end tag missing: </thead>
[ERROR] * <col width="50%"/> <col width="50%"/> <thead>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:73:
 error: no summary or caption for table
[ERROR] * </table>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:74:
 error: self-closing element not allowed
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-zipkin/src/main/java/org/apache/htrace/zipkin/HTraceToZipkinConverter.java:74:
 warning: empty <p> tag
[ERROR] * <p/>
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:633:
 warning: no @return
[ERROR] boolean hasTraceId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:637:
 warning: no @return
[ERROR] long getTraceId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:643:
 warning: no @return
[ERROR] boolean hasParentId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:647:
 warning: no @return
[ERROR] long getParentId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:653:
 warning: no @return
[ERROR] boolean hasStart();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:657:
 warning: no @return
[ERROR] long getStart();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:663:
 warning: no @return
[ERROR] boolean hasStop();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:667:
 warning: no @return
[ERROR] long getStop();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:673:
 warning: no @return
[ERROR] boolean hasSpanId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:677:
 warning: no @return
[ERROR] long getSpanId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:683:
 warning: no @return
[ERROR] boolean hasProcessId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:687:
 warning: no @return
[ERROR] java.lang.String getProcessId();
[ERROR] ^
[ERROR] 
/usr/local/incubator-htrace/htrace-hbase/src/main/java/org/apache/htrace/protobuf/generated/SpanProtos.java:692:
 warning: no @return
[ERROR] getProcessIdBytes();
[ERROR] ^
[ERROR]
[ERROR] Command line was: 
/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/bin/javadoc 
@options @packages
[ERROR]
[ERROR] Refer to the generated Javadoc files in 
'/usr/local/incubator-htrace/target/site/apidocs' dir.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please 
read the following articles:
[ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
{code}

I've also attached the help-doc.html

bq. Perhaps we need to fix those subprojects as well?
Agreed

> Cannot build Javadoc with JDK1.8.X
> ----------------------------------
>
>                 Key: HTRACE-368
>                 URL: https://issues.apache.org/jira/browse/HTRACE-368
>             Project: HTrace
>          Issue Type: Improvement
>          Components: build, docs
>    Affects Versions: 4.1
>            Reporter: Lewis John McGibbney
>            Assignee: Lewis John McGibbney
>            Priority: Minor
>         Attachments: HTRACE-368.patch
>
>
> Right now if I attempt to build Javadoc in master branch with following JDK I 
> get a hellish error which indicates Javadoc in HTrace Java source needs some 
> attention. 
> {code}
> lmcgibbn@LMC-032857 /usr/local/incubator-htrace(master) $ mvn -version
> Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 
> 2015-04-22T04:57:37-07:00)
> Maven home: /usr/local/apache-maven-3.3.3
> Java version: 1.8.0_66, vendor: Oracle Corporation
> Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre
> Default locale: en_US, platform encoding: UTF-8
> OS name: "mac os x", version: "10.9.5", arch: "x86_64", family: "mac"
> {code}
> For the interim I propose to submit a profile which would allow us to work 
> around the Javadoc issue. 



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