How to troubleshoot WAS hung threads all pointing to java/utils/zip/Deflate ?

[2/12/21 16:28:04:990 EST] 00005bf6 ThreadMonitor W   WSVR0605W: Thread "WebContainer : 66 @@ 16:03 jtn <Jakarta Commons-HttpClient/3.1@IPADDRESS> /ccm/service/com.ibm.team.build.internal.common.ITeamBuildService" (000001f2) has been active for 1466696 milliseconds and may be hung.  There is/are 27 thread(s) in total in the server that may be hung

Thread analyzer stack info for WebContainer :66 has a rather lengthy stack trace:

at java/util/zip/Deflater.deflateBytes(Native Method)
at java/util/zip/Deflater.deflate(Deflater.java:455(Compiled Code))
at java/util/zip/Deflater.deflate(Deflater.java:377(Compiled Code))
at java/util/zip/DeflaterOutputStream.deflate(DeflaterOutputStream.java:262(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet$4.deflate(AbstractTeamServerServlet.java:917(Compiled Code))
at java/util/zip/DeflaterOutputStream.write(DeflaterOutputStream.java:222(Compiled Code))
at java/util/zip/GZIPOutputStream.write(GZIPOutputStream.java:156(Compiled Code))
at sun/nio/cs/StreamEncoder.writeBytes(StreamEncoder.java:233(Compiled Code))
at sun/nio/cs/StreamEncoder.implFlushBuffer(StreamEncoder.java:303(Compiled Code))
at sun/nio/cs/StreamEncoder.implFlush(StreamEncoder.java:307(Compiled Code))
at sun/nio/cs/StreamEncoder.flush(StreamEncoder.java:153(Compiled Code))
at java/io/OutputStreamWriter.flush(OutputStreamWriter.java:287(Compiled Code))
at java/io/BufferedWriter.flush(BufferedWriter.java:265(Compiled Code))
at com/ibm/team/repository/common/internal/marshal/impl/MarshallerWriter.flush(MarshallerWriter.java:75(Compiled Code))
at com/ibm/team/repository/common/internal/marshal/impl/EObjectMarshaller.marshalObjectToOutputStream(EObjectMarshaller.java:155(Compiled Code))
at com/ibm/team/repository/common/internal/marshal/impl/WebServicesMarshaller.marshalObjectToOutputStream(WebServicesMarshaller.java:485(Compiled Code))
at com/ibm/team/repository/common/internal/marshal/impl/WebServicesMarshaller.marshalFaultServiceResponse(WebServicesMarshaller.java:374)
at com/ibm/team/repository/servlet/internal/TeamServletResponseHelper.sendFaultResponse(TeamServletResponseHelper.java:66)
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.doPost(AbstractTeamServerServlet.java:955(Compiled Code))
at javax/servlet/http/HttpServlet.service(HttpServlet.java:707)
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.handleRequest2(AbstractTeamServerServlet.java:2848(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.handleRequest(AbstractTeamServerServlet.java:2613(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.access$0(AbstractTeamServerServlet.java:2598(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet$1.service(AbstractTeamServerServlet.java:268(Compiled Code))
at com/ibm/team/repository/internal/service/auth/impl/JAuthHandler$1.run(JAuthHandler.java:110(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.handleAuthentication(AbstractTeamServerServlet.java:2285(Compiled Code))
at com/ibm/team/repository/servlet/AbstractTeamServerServlet.service(AbstractTeamServerServlet.java:1928(Compiled Code))
at javax/servlet/http/HttpServlet.service(HttpServlet.java:790(Compiled Code))
at org/eclipse/equinox/http/registry/internal/ServletManager$ServletWrapper.service(ServletManager.java:180(Compiled Code))
at org/eclipse/equinox/http/servlet/internal/ServletRegistration.service(ServletRegistration.java:61(Compiled Code))
at org/eclipse/equinox/http/servlet/internal/ProxyServlet.processAlias(ProxyServlet.java:128(Compiled Code))
at org/eclipse/equinox/http/servlet/internal/ProxyServlet.service(ProxyServlet.java:76(Compiled Code))
at javax/servlet/http/HttpServlet.service(HttpServlet.java:790(Compiled Code))
at org/eclipse/equinox/servletbridge/BridgeServlet.service(BridgeServlet.java:152(Compiled Code))
at com/ibm/team/repository/server/servletbridge/JazzServlet.service(JazzServlet.java:74(Compiled Code))
at javax/servlet/http/HttpServlet.service(HttpServlet.java:790(Compiled Code))
at com/ibm/ws/webcontainer/servlet/ServletWrapper.service(ServletWrapper.java:1235(Compiled Code))
at com/ibm/ws/webcontainer/servlet/ServletWrapper.handleRequest(ServletWrapper.java:779(Compiled Code))
at com/ibm/ws/webcontainer/servlet/ServletWrapper.handleRequest(ServletWrapper.java:478(Compiled Code))
at com/ibm/ws/webcontainer/servlet/ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:179(Compiled Code))
at com/ibm/ws/webcontainer/filter/WebAppFilterChain.invokeTarget(WebAppFilterChain.java:143(Compiled Code))
at com/ibm/ws/webcontainer/filter/WebAppFilterChain.doFilter(WebAppFilterChain.java:96(Compiled Code))
at com/ibm/team/repository/server/servletbridge/BridgeFilter.processDelegate(BridgeFilter.java:165(Compiled Code))
at com/ibm/team/repository/server/servletbridge/BridgeFilter.doFilter(BridgeFilter.java:198(Compiled Code))
at com/ibm/ws/webcontainer/filter/FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:197(Compiled Code))
at com/ibm/ws/webcontainer/filter/WebAppFilterChain.doFilter(WebAppFilterChain.java:90(Compiled Code))
at com/ibm/ws/webcontainer/filter/WebAppFilterManager.doFilter(WebAppFilterManager.java:979(Compiled Code))
at com/ibm/ws/webcontainer/filter/WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1119(Compiled Code))
at com/ibm/ws/webcontainer/servlet/CacheServletWrapper.handleRequest(CacheServletWrapper.java:82(Compiled Code))
at com/ibm/ws/webcontainer/WebContainer.handleRequest(WebContainer.java:963(Compiled Code))
at com/ibm/ws/webcontainer/WSWebContainer.handleRequest(WSWebContainer.java:1817(Compiled Code))
at com/ibm/ws/webcontainer/channel/WCChannelLink.ready(WCChannelLink.java:382(Compiled Code))
at com/ibm/ws/http/channel/inbound/impl/HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465(Compiled Code))
at com/ibm/ws/http/channel/inbound/impl/HttpInboundLink.handleNewRequest(HttpInboundLink.java:532(Compiled Code))
at com/ibm/ws/http/channel/inbound/impl/HttpInboundLink.processRequest(HttpInboundLink.java:318(Compiled Code))
at com/ibm/ws/http/channel/inbound/impl/HttpICLReadCallback.complete(HttpICLReadCallback.java:88(Compiled Code))
at com/ibm/ws/ssl/channel/impl/SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1833(Compiled Code))
at com/ibm/ws/tcp/channel/impl/WorkQueueManager.requestComplete(WorkQueueManager.java:558(Compiled Code))
at com/ibm/ws/tcp/channel/impl/WorkQueueManager.attemptIO(WorkQueueManager.java:608(Compiled Code))
at com/ibm/ws/tcp/channel/impl/WorkQueueManager.workerRun(WorkQueueManager.java:985(Compiled Code))
at com/ibm/ws/tcp/channel/impl/WorkQueueManager$Worker.run(WorkQueueManager.java:1074(Compiled Code))
at com/ibm/ws/util/ThreadPool$Worker.run(ThreadPool.java:1909(Compiled Code))

Anyone have any suggestions ?